server/sources/rql2sql.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Thu, 19 May 2011 10:35:20 +0200
branchstable
changeset 7396 8345ee2c2ea6
parent 7394 d11d88bd08e8
child 7397 6a9e66d788b3
child 7421 5115daeeb2ff
permissions -rw-r--r--
[rql2sql] fix in 7394:d11d88bd08e8 was actually not needed
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# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""RQL to SQL generator for native sources.
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SQL queries optimization
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~~~~~~~~~~~~~~~~~~~~~~~~
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1. CWUser X WHERE X in_group G, G name 'users':
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   CWUser is the only subject entity type for the in_group relation,
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   which allow us to do ::
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     SELECT eid_from FROM in_group, CWGroup
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     WHERE in_group.eid_to = CWGroup.eid_from
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     AND CWGroup.name = 'users'
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2. Any X WHERE X nonfinal1 Y, Y nonfinal2 Z
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   -> direct join between nonfinal1 and nonfinal2, whatever X,Y, Z (unless
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      inlined...)
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      NOT IMPLEMENTED (and quite hard to implement)
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Potential optimization information is collected by the querier, sql generation
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is done according to this information
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cross RDMS note : read `Comparison of different SQL implementations`_
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by Troels Arvin. Features SQL ISO Standard, PG, mysql, Oracle, MS SQL, DB2
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and Informix.
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.. _Comparison of different SQL implementations: http://www.troels.arvin.dk/db/rdbms
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"""
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__docformat__ = "restructuredtext en"
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import threading
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from datetime import datetime, time
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from logilab.common.date import utcdatetime, utctime
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from logilab.database import FunctionDescr, SQL_FUNCTIONS_REGISTRY
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from rql import BadRQLQuery, CoercionError
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from rql.stmts import Union, Select
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from rql.nodes import (SortTerm, VariableRef, Constant, Function, Variable, Or,
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                       Not, Comparison, ColumnAlias, Relation, SubQuery, Exists)
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from cubicweb import QueryError
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from cubicweb.server.sqlutils import SQL_PREFIX
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from cubicweb.server.utils import cleanup_solutions
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ColumnAlias._q_invariant = False # avoid to check for ColumnAlias / Variable
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FunctionDescr.source_execute = None
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def default_update_cb_stack(self, stack):
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    stack.append(self.source_execute)
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FunctionDescr.update_cb_stack = default_update_cb_stack
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LENGTH = SQL_FUNCTIONS_REGISTRY.get_function('LENGTH')
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def length_source_execute(source, session, value):
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    return len(value.getvalue())
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LENGTH.source_execute = length_source_execute
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def _new_var(select, varname):
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    newvar = select.get_variable(varname)
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    if not 'relations' in newvar.stinfo:
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        # not yet initialized
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        newvar.prepare_annotation()
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        newvar.stinfo['scope'] = select
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        newvar._q_invariant = False
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        select.selection.append(VariableRef(newvar))
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    return newvar
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def _fill_to_wrap_rel(var, newselect, towrap, schema):
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    for rel in var.stinfo['relations'] - var.stinfo['rhsrelations']:
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        rschema = schema.rschema(rel.r_type)
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        if rschema.inlined:
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            towrap.add( (var, rel) )
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            for vref in rel.children[1].iget_nodes(VariableRef):
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                newivar = _new_var(newselect, vref.name)
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                _fill_to_wrap_rel(vref.variable, newselect, towrap, schema)
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        elif rschema.final:
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            towrap.add( (var, rel) )
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            for vref in rel.children[1].iget_nodes(VariableRef):
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                newivar = _new_var(newselect, vref.name)
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                newivar.stinfo['attrvar'] = (var, rel.r_type)
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def rewrite_unstable_outer_join(select, solutions, unstable, schema):
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    """if some optional variables are unstable, they should be selected in a
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    subquery. This function check this and rewrite the rql syntax tree if
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    necessary (in place). Return a boolean telling if the tree has been modified
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    """
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    modified = False
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    for varname in tuple(unstable):
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        var = select.defined_vars[varname]
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        if not var.stinfo.get('optrelations'):
0
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diff changeset
   113
            continue
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   114
        unstable.remove(varname)
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diff changeset
   115
        newselect = Select()
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diff changeset
   116
        newselect.need_distinct = False
0
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   117
        myunion = Union()
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   118
        myunion.append(newselect)
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   119
        # extract aliases / selection
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   120
        newvar = _new_var(newselect, var.name)
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   121
        newselect.selection = [VariableRef(newvar)]
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   122
        towrap_rels = set()
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   123
        _fill_to_wrap_rel(var, newselect, towrap_rels, schema)
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   124
        # extract relations
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   125
        for var, rel in towrap_rels:
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   126
            newrel = rel.copy(newselect)
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   127
            newselect.add_restriction(newrel)
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   128
            select.remove_node(rel)
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   129
            var.stinfo['relations'].remove(rel)
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   130
            newvar.stinfo['relations'].add(newrel)
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   131
            if rel.optional in ('left', 'both'):
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diff changeset
   132
                newvar.add_optional_relation(newrel)
0
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   133
            for vref in newrel.children[1].iget_nodes(VariableRef):
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   134
                var = vref.variable
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   135
                var.stinfo['relations'].add(newrel)
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   136
                var.stinfo['rhsrelations'].add(newrel)
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diff changeset
   137
                if rel.optional in ('right', 'both'):
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diff changeset
   138
                    var.add_optional_relation(newrel)
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20af96a6fffc [rql2sql] add test for rql bug #37423, which triggered a cw bug fixed by this changeset (infinite loop with some queries...)
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parents: 6003
diff changeset
   139
        if not select.where and not modified:
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diff changeset
   140
            # oops, generated the same thing as the original select....
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parents: 6003
diff changeset
   141
            # restore original query, else we'll indefinitly loop
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diff changeset
   142
            for var, rel in towrap_rels:
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diff changeset
   143
                select.add_restriction(rel)
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diff changeset
   144
            continue
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diff changeset
   145
        modified = True
0
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diff changeset
   146
        # extract subquery solutions
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07196bda2456 take care to already existant solutions local variable
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parents: 3689
diff changeset
   147
        mysolutions = [sol.copy() for sol in solutions]
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parents: 3689
diff changeset
   148
        cleanup_solutions(newselect, mysolutions)
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20af96a6fffc [rql2sql] add test for rql bug #37423, which triggered a cw bug fixed by this changeset (infinite loop with some queries...)
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diff changeset
   149
        newselect.set_possible_types(mysolutions)
0
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   150
        # full sub-query
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diff changeset
   151
        aliases = [VariableRef(select.get_variable(avar.name, i))
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diff changeset
   152
                   for i, avar in enumerate(newselect.selection)]
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   153
        select.add_subquery(SubQuery(aliases, myunion), check=False)
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diff changeset
   154
    return modified
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diff changeset
   155
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   156
def _new_solutions(rqlst, solutions):
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diff changeset
   157
    """first filter out subqueries variables from solutions"""
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diff changeset
   158
    newsolutions = []
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diff changeset
   159
    for origsol in solutions:
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   160
        asol = {}
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   161
        for vname in rqlst.defined_vars:
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diff changeset
   162
            asol[vname] = origsol[vname]
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diff changeset
   163
        if not asol in newsolutions:
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diff changeset
   164
            newsolutions.append(asol)
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diff changeset
   165
    return newsolutions
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diff changeset
   166
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diff changeset
   167
def remove_unused_solutions(rqlst, solutions, varmap, schema):
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diff changeset
   168
    """cleanup solutions: remove solutions where invariant variables are taking
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diff changeset
   169
    different types
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diff changeset
   170
    """
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03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   171
    newsols = _new_solutions(rqlst, solutions)
0
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   172
    existssols = {}
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diff changeset
   173
    unstable = set()
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03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   174
    invariants = {}
0
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diff changeset
   175
    for vname, var in rqlst.defined_vars.iteritems():
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03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   176
        vtype = newsols[0][vname]
0
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diff changeset
   177
        if var._q_invariant or vname in varmap:
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03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   178
            # remove invariant variable from solutions to remove duplicates
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diff changeset
   179
            # later, then reinserting a type for the variable even later
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diff changeset
   180
            for sol in newsols:
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   181
                invariants.setdefault(id(sol), {})[vname] = sol.pop(vname)
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   182
        elif var.scope is not rqlst:
0
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parents:
diff changeset
   183
            # move appart variables which are in a EXISTS scope and are variating
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diff changeset
   184
            try:
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diff changeset
   185
                thisexistssols, thisexistsvars = existssols[var.scope]
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diff changeset
   186
            except KeyError:
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03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   187
                thisexistssols = [newsols[0]]
0
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parents:
diff changeset
   188
                thisexistsvars = set()
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diff changeset
   189
                existssols[var.scope] = thisexistssols, thisexistsvars
3852
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   190
            for i in xrange(len(newsols)-1, 0, -1):
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   191
                if vtype != newsols[i][vname]:
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   192
                    thisexistssols.append(newsols.pop(i))
0
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parents:
diff changeset
   193
                    thisexistsvars.add(vname)
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parents:
diff changeset
   194
        else:
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diff changeset
   195
            # remember unstable variables
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03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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parents: 3815
diff changeset
   196
            for i in xrange(1, len(newsols)):
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   197
                if vtype != newsols[i][vname]:
0
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parents:
diff changeset
   198
                    unstable.add(vname)
3852
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   199
    if invariants:
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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parents: 3815
diff changeset
   200
        # filter out duplicates
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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parents: 3815
diff changeset
   201
        newsols_ = []
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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parents: 3815
diff changeset
   202
        for sol in newsols:
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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parents: 3815
diff changeset
   203
            if not sol in newsols_:
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   204
                newsols_.append(sol)
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parents: 3815
diff changeset
   205
        newsols = newsols_
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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parents: 3815
diff changeset
   206
        # reinsert solutions for invariants
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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parents: 3815
diff changeset
   207
        for sol in newsols:
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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parents: 3815
diff changeset
   208
            for invvar, vartype in invariants[id(sol)].iteritems():
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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parents: 3815
diff changeset
   209
                sol[invvar] = vartype
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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parents: 3815
diff changeset
   210
        for sol in existssols:
3866
2783c166ad1a fix potential key error
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parents: 3852
diff changeset
   211
            try:
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diff changeset
   212
                for invvar, vartype in invariants[id(sol)].iteritems():
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diff changeset
   213
                    sol[invvar] = vartype
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parents: 3852
diff changeset
   214
            except KeyError:
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parents: 3852
diff changeset
   215
                continue
3852
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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parents: 3815
diff changeset
   216
    if len(newsols) > 1:
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   217
        if rewrite_unstable_outer_join(rqlst, newsols, unstable, schema):
0
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parents:
diff changeset
   218
            # remove variables extracted to subqueries from solutions
3852
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   219
            newsols = _new_solutions(rqlst, newsols)
03121ca1f85e test and fix case where remove_unsused_solutions remove some solutions that should be kept
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diff changeset
   220
    return newsols, existssols, unstable
0
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parents:
diff changeset
   221
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parents:
diff changeset
   222
def relation_info(relation):
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parents:
diff changeset
   223
    lhs, rhs = relation.get_variable_parts()
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parents:
diff changeset
   224
    try:
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diff changeset
   225
        lhs = lhs.variable
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parents:
diff changeset
   226
        lhsconst = lhs.stinfo['constnode']
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parents:
diff changeset
   227
    except AttributeError:
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parents:
diff changeset
   228
        lhsconst = lhs
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        lhs = None
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    except KeyError:
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        lhsconst = None # ColumnAlias
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    try:
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        rhs = rhs.variable
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        rhsconst = rhs.stinfo['constnode']
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    except AttributeError:
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        rhsconst = rhs
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        rhs = None
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    except KeyError:
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        rhsconst = None # ColumnAlias
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    return lhs, lhsconst, rhs, rhsconst
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def switch_relation_field(sql, table=''):
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    switchedsql = sql.replace(table + '.eid_from', '__eid_from__')
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    switchedsql = switchedsql.replace(table + '.eid_to',
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                                      table + '.eid_from')
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    return switchedsql.replace('__eid_from__', table + '.eid_to')
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def sort_term_selection(sorts, selectedidx, rqlst, groups):
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    # XXX beurk
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    if isinstance(rqlst, list):
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        def append(term):
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            rqlst.append(term)
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    else:
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        def append(term):
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            rqlst.selection.append(term.copy(rqlst))
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    for sortterm in sorts:
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        term = sortterm.term
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        if not isinstance(term, Constant) and not str(term) in selectedidx:
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            selectedidx.append(str(term))
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            append(term)
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            if groups:
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                for vref in term.iget_nodes(VariableRef):
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                    if not vref in groups:
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                        groups.append(vref)
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def fix_selection_and_group(rqlst, selectedidx, needwrap, selectsortterms,
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                            sorts, groups, having):
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    if selectsortterms and sorts:
0
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        sort_term_selection(sorts, selectedidx, rqlst, not needwrap and groups)
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    if sorts and groups:
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        # when a query is grouped, ensure sort terms are grouped as well
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        for sortterm in sorts:
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            term = sortterm.term
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            if not isinstance(term, Constant):
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                for vref in term.iget_nodes(VariableRef):
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                    if not vref in groups:
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                        groups.append(vref)
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    if needwrap:
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        if groups:
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            for vref in groups:
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                if not vref.name in selectedidx:
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                    selectedidx.append(vref.name)
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                    rqlst.selection.append(vref)
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        if having:
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            for term in having:
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                for vref in term.iget_nodes(VariableRef):
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                    if not vref.name in selectedidx:
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                        selectedidx.append(vref.name)
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                        rqlst.selection.append(vref)
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def iter_mapped_var_sels(stmt, variable):
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    # variable is a Variable or ColumnAlias node mapped to a source side
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    # callback
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    if not (len(variable.stinfo['rhsrelations']) <= 1 and # < 1 on column alias
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            variable.stinfo['selected']):
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        raise QueryError("can't use %s as a restriction variable"
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                         % variable.name)
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    for selectidx in variable.stinfo['selected']:
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        vrefs = stmt.selection[selectidx].get_nodes(VariableRef)
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        if len(vrefs) != 1:
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            raise QueryError()
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        yield selectidx, vrefs[0]
0
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def update_source_cb_stack(state, stmt, node, stack):
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    while True:
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        node = node.parent
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        if node is stmt:
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            break
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        if not isinstance(node, Function):
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            raise QueryError()
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        func = SQL_FUNCTIONS_REGISTRY.get_function(node.name)
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        if func.source_execute is None:
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            raise QueryError('%s can not be called on mapped attribute'
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                             % node.name)
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        state.source_cb_funcs.add(node)
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        func.update_cb_stack(stack)
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# IGenerator implementation for RQL->SQL #######################################
0
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class StateInfo(object):
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    """this class stores data accumulated during the RQL syntax tree visit
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    for later SQL generation.
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    Attributes related to OUTER JOIN handling
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    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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    * `outer_chains`, list of list of strings. Each list represent a tables
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      that have to be outer joined together.
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   329
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    * `outer_tables`, dictionnary used as index of tables used in outer join ::
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   331
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        'table alias': (outertype, [conditions], [chain])
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   333
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   334
      where:
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   335
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      * `outertype` is one of None, 'LEFT', 'RIGHT', 'FULL'
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      * `conditions` is a list of join conditions (string)
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      * `chain` is a list of table alias (the *outer chain*) in which the key
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        alias appears
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    * `outer_pending` is a dictionary containing some conditions that will have
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      to be added to the outer join when the table will be turned into an
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      outerjoin ::
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   344
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       'table alias': [conditions]
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    """
5582
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   347
    def __init__(self, select, existssols, unstablevars):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   348
        self.existssols = existssols
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   349
        self.unstablevars = unstablevars
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   350
        self.subtables = {}
5013
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   351
        self.needs_source_cb = None
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   352
        self.subquery_source_cb = None
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   353
        self.source_cb_funcs = set()
5582
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   354
        self.scopes = {select: 0}
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   355
        self.scope_nodes = []
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
   356
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   357
    def reset(self, solution):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   358
        """reset some visit variables"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   359
        self.solution = solution
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   360
        self.count = 0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   361
        self.done = set()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   362
        self.tables = self.subtables.copy()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   363
        self.actual_tables = [[]]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   364
        for _, tsql in self.tables.itervalues():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   365
            self.actual_tables[-1].append(tsql)
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   366
        self.outer_chains = []
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   367
        self.outer_tables = {}
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   368
        self.outer_pending = {}
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   369
        self.duplicate_switches = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   370
        self.aliases = {}
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   371
        self.restrictions = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   372
        self._restr_stack = []
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
   373
        self.ignore_varmap = False
5013
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   374
        self._needs_source_cb = {}
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   375
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   376
    def merge_source_cbs(self, needs_source_cb):
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   377
        if self.needs_source_cb is None:
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   378
            self.needs_source_cb = needs_source_cb
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   379
        elif needs_source_cb != self.needs_source_cb:
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   380
            raise QueryError('query fetch some source mapped attribute, some not')
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   381
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   382
    def finalize_source_cbs(self):
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   383
        if self.subquery_source_cb is not None:
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   384
            self.needs_source_cb.update(self.subquery_source_cb)
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
   385
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   386
    def add_restriction(self, restr):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   387
        if restr:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   388
            self.restrictions.append(restr)
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
   389
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   390
    def iter_exists_sols(self, exists):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   391
        if not exists in self.existssols:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   392
            yield 1
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   393
            return
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   394
        thisexistssols, thisexistsvars = self.existssols[exists]
7042
8bcf33c493f8 [sql generation] fix exists table scope pb: when iterating other solutions inner to an EXISTS subquery, we should reset variables which have this exists node as scope
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6940
diff changeset
   395
        # when iterating other solutions inner to an EXISTS subquery, we should
8bcf33c493f8 [sql generation] fix exists table scope pb: when iterating other solutions inner to an EXISTS subquery, we should reset variables which have this exists node as scope
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6940
diff changeset
   396
        # reset variables which have this exists node as scope at each iteration
8bcf33c493f8 [sql generation] fix exists table scope pb: when iterating other solutions inner to an EXISTS subquery, we should reset variables which have this exists node as scope
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6940
diff changeset
   397
        for var in exists.stmt.defined_vars.itervalues():
8bcf33c493f8 [sql generation] fix exists table scope pb: when iterating other solutions inner to an EXISTS subquery, we should reset variables which have this exists node as scope
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6940
diff changeset
   398
            if var.scope is exists:
8bcf33c493f8 [sql generation] fix exists table scope pb: when iterating other solutions inner to an EXISTS subquery, we should reset variables which have this exists node as scope
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6940
diff changeset
   399
                thisexistsvars.add(var.name)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   400
        origsol = self.solution
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   401
        origtables = self.tables
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   402
        done = self.done
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   403
        for thisexistssol in thisexistssols:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   404
            for vname in self.unstablevars:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   405
                if thisexistssol[vname] != origsol[vname] and vname in thisexistsvars:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   406
                    break
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   407
            else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   408
                self.tables = origtables.copy()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   409
                self.solution = thisexistssol
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   410
                yield 1
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   411
                # cleanup self.done from stuff specific to exists
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   412
                for var in thisexistsvars:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   413
                    if var in done:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   414
                        done.remove(var)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   415
                for rel in exists.iget_nodes(Relation):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   416
                    if rel in done:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   417
                        done.remove(rel)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   418
        self.solution = origsol
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   419
        self.tables = origtables
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   420
5582
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   421
    def push_scope(self, scope_node):
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   422
        self.scope_nodes.append(scope_node)
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   423
        self.scopes[scope_node] = len(self.actual_tables)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   424
        self.actual_tables.append([])
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   425
        self._restr_stack.append(self.restrictions)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   426
        self.restrictions = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   427
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   428
    def pop_scope(self):
5582
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   429
        del self.scopes[self.scope_nodes[-1]]
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   430
        self.scope_nodes.pop()
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   431
        restrictions = self.restrictions
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   432
        self.restrictions = self._restr_stack.pop()
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   433
        scope = len(self.actual_tables) - 1
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   434
        # check if we have some outer chain for this scope
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   435
        matching_chains = []
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   436
        for chain in self.outer_chains:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   437
            for tablealias in chain:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   438
                if self.tables[tablealias][0] < scope:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   439
                    # chain belongs to outer scope
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   440
                    break
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   441
            else:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   442
                # chain match current scope
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   443
                matching_chains.append(chain)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   444
        # call to `tables_sql` will pop actual_tables
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   445
        tables = self.tables_sql(matching_chains)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   446
        # cleanup outer join related structure for tables in matching chains
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   447
        for chain in matching_chains:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   448
            self.outer_chains.remove(chain)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   449
            for alias in chain:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   450
                del self.outer_tables[alias]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   451
        return restrictions, tables
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   452
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   453
    # tables handling #########################################################
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   454
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   455
    def add_table(self, table, key=None, scope=-1):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   456
        if key is None:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   457
            key = table
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   458
        if key in self.tables:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   459
            return
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   460
        if scope < 0:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   461
            scope = len(self.actual_tables) + scope
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   462
        self.tables[key] = (scope, table)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   463
        self.actual_tables[scope].append(table)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   464
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   465
    def alias_and_add_table(self, tablename, scope=-1):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   466
        alias = '%s%s' % (tablename, self.count)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   467
        self.count += 1
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   468
        self.add_table('%s AS %s' % (tablename, alias), alias, scope)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   469
        return alias
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   470
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   471
    def relation_table(self, relation):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   472
        """return the table alias used by the given relation"""
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   473
        if relation in self.done:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   474
            return relation._q_sqltable
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   475
        rid = 'rel_%s%s' % (relation.r_type, self.count)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   476
        # relation's table is belonging to the root scope if it is the principal
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   477
        # table of one of it's variable and if that variable belong's to parent
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   478
        # scope
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   479
        for varref in relation.iget_nodes(VariableRef):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   480
            var = varref.variable
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   481
            if isinstance(var, ColumnAlias):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   482
                scope = 0
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   483
                break
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   484
            # XXX may have a principal without being invariant for this generation,
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   485
            #     not sure this is a pb or not
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   486
            if var.stinfo.get('principal') is relation and var.scope is var.stmt:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   487
                scope = 0
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   488
                break
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   489
        else:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   490
            scope = -1
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   491
        self.count += 1
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   492
        self.add_table('%s_relation AS %s' % (relation.r_type, rid), rid, scope=scope)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   493
        relation._q_sqltable = rid
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   494
        self.done.add(relation)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   495
        return rid
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   496
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   497
    def fti_table(self, relation, fti_table):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   498
        """return the table alias used by the given has_text relation,
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   499
        `fti_table` being the table name for the plain text index
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   500
        """
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   501
        if relation in self.done:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   502
            try:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   503
                return relation._q_sqltable
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   504
            except AttributeError:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   505
                pass
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   506
        self.done.add(relation)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   507
        scope = self.scopes[relation.scope]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   508
        alias = self.alias_and_add_table(fti_table, scope=scope)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   509
        relation._q_sqltable = alias
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   510
        return alias
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   511
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   512
    # outer join handling ######################################################
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   513
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   514
    def mark_as_used_in_outer_join(self, tablealias, addpending=True):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   515
        """Mark table of given alias as used in outer join. This must be called
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   516
        after `outer_tables[tablealias]` has been initialized.
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   517
        """
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   518
        # remove a table from actual_table because it's used in an outer join
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   519
        # chain
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   520
        scope, tabledef = self.tables[tablealias]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   521
        self.actual_tables[scope].remove(tabledef)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   522
        # check if there are some pending outer join condition for this table
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   523
        if addpending:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   524
            try:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   525
                pending_conditions = self.outer_pending.pop(tablealias)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   526
            except KeyError:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   527
                pass
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   528
            else:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   529
                self.outer_tables[tablealias][1].extend(pending_conditions)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   530
        else:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   531
            assert not tablealias in self.outer_pending
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   532
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   533
    def add_outer_join_condition(self, tablealias, condition):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   534
        try:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   535
            outer, conditions, chain = self.outer_tables[tablealias]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   536
            conditions.append(condition)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   537
        except KeyError:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   538
            self.outer_pending.setdefault(tablealias, []).append(condition)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   539
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   540
    def replace_tables_by_outer_join(self, leftalias, rightalias,
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   541
                                     outertype, condition):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   542
        """tell we need <leftalias> <outertype> JOIN <rightalias> ON <condition>
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   543
        """
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   544
        assert leftalias != rightalias, leftalias
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   545
        outer_tables = self.outer_tables
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   546
        louter, lconditions, lchain = outer_tables.get(leftalias,
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   547
                                                      (None, None, None))
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   548
        router, rconditions, rchain = outer_tables.get(rightalias,
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   549
                                                      (None, None, None))
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   550
        if lchain is None and rchain is None:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   551
            # create a new outer chaine
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   552
            chain = [leftalias, rightalias]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   553
            outer_tables[leftalias] = (None, [], chain)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   554
            outer_tables[rightalias] = (outertype, [condition], chain)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   555
            self.outer_chains.append(chain)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   556
            self.mark_as_used_in_outer_join(leftalias, addpending=False)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   557
            self.mark_as_used_in_outer_join(rightalias)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   558
        elif lchain is None:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   559
            # [A > B > C] + [D > A] -> [D > A > B > C]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   560
            if rightalias == rchain[0]:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   561
                outer_tables[leftalias] = (None, [], rchain)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   562
                conditions = outer_tables[rightalias][1] + [condition]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   563
                outer_tables[rightalias] = (outertype, conditions, rchain)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   564
                rchain.insert(0, leftalias)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   565
            else:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   566
                # [A > B > C] + [D > B] -> [A > B > C < D]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   567
                if outertype == 'LEFT':
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   568
                    outertype = 'RIGHT'
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   569
                outer_tables[leftalias] = (outertype, [condition], rchain)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   570
                rchain.append(leftalias)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   571
            self.mark_as_used_in_outer_join(leftalias)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   572
        elif rchain is None:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   573
            # [A > B > C] + [B > D] -> [A > B > C > D]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   574
            outer_tables[rightalias] = (outertype, [condition], lchain)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   575
            lchain.append(rightalias)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   576
            self.mark_as_used_in_outer_join(rightalias)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   577
        elif lchain is rchain:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   578
            # already in the same chain, simply check compatibility and append
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   579
            # the condition if it's ok
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   580
            lidx = lchain.index(leftalias)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   581
            ridx = lchain.index(rightalias)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   582
            if (outertype == 'FULL' and router != 'FULL') \
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   583
                   or (lidx < ridx and router != 'LEFT') \
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   584
                   or (ridx < lidx and louter != 'RIGHT'):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   585
                raise BadRQLQuery()
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   586
            # merge conditions
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   587
            if lidx < ridx:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   588
                rconditions.append(condition)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   589
            else:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   590
                lconditions.append(condition)
7357
5ad3154a8810 [rql2sql] fix bug avoiding outer join relation to be used as a variable principal. Closes #1659395
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7252
diff changeset
   591
        elif louter is None:
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   592
            # merge chains
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   593
            self.outer_chains.remove(lchain)
7357
5ad3154a8810 [rql2sql] fix bug avoiding outer join relation to be used as a variable principal. Closes #1659395
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7252
diff changeset
   594
            rchain += lchain
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   595
            self.mark_as_used_in_outer_join(leftalias)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   596
            for alias, (aouter, aconditions, achain) in outer_tables.iteritems():
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   597
                if achain is lchain:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   598
                    outer_tables[alias] = (aouter, aconditions, rchain)
7357
5ad3154a8810 [rql2sql] fix bug avoiding outer join relation to be used as a variable principal. Closes #1659395
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7252
diff changeset
   599
        else:
5ad3154a8810 [rql2sql] fix bug avoiding outer join relation to be used as a variable principal. Closes #1659395
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7252
diff changeset
   600
            raise BadRQLQuery()
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   601
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   602
    # sql generation helpers ###################################################
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   603
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   604
    def tables_sql(self, outer_chains=None):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   605
        """generate SQL for FROM clause"""
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   606
        # sort for test predictability
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   607
        tables = sorted(self.actual_tables.pop())
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   608
        # process outer joins
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   609
        if outer_chains is None:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   610
            assert not self.actual_tables, self.actual_tables
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   611
            assert not self.outer_pending
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   612
            outer_chains = self.outer_chains
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   613
        for chain in sorted(outer_chains):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   614
            tablealias = chain[0]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   615
            outertype, conditions, _ = self.outer_tables[tablealias]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   616
            assert _ is chain, (chain, _)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   617
            assert outertype is None, (chain, self.outer_chains)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   618
            assert not conditions, (chain, self.outer_chains)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   619
            assert len(chain) > 1
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   620
            tabledef = self.tables[tablealias][1]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   621
            outerjoin = [tabledef]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   622
            for tablealias in chain[1:]:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   623
                outertype, conditions, _ = self.outer_tables[tablealias]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   624
                assert _ is chain, (chain, self.outer_chains)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   625
                assert outertype in ('LEFT', 'RIGHT', 'FULL'), (
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   626
                    tablealias, outertype, conditions)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   627
                assert isinstance(conditions, (list)), (
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   628
                    tablealias, outertype, conditions)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   629
                tabledef = self.tables[tablealias][1]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   630
                outerjoin.append('%s OUTER JOIN %s ON (%s)' % (
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   631
                    outertype, tabledef, ' AND '.join(conditions)))
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   632
            tables.append(' '.join(outerjoin))
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   633
        return ', '.join(tables)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   634
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
   635
5782
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   636
def extract_fake_having_terms(having):
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   637
    """RQL's HAVING may be used to contains stuff that should go in the WHERE
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   638
    clause of the SQL query, due to RQL grammar limitation. Split them...
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   639
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   640
    Return a list nodes that can be ANDed with query's WHERE clause. Having
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   641
    subtrees updated in place.
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   642
    """
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   643
    fakehaving = []
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   644
    for subtree in having:
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   645
        ors, tocheck = set(), []
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   646
        for compnode in subtree.get_nodes(Comparison):
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   647
            for fnode in compnode.get_nodes(Function):
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   648
                if fnode.descr().aggregat:
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   649
                    p = compnode.parent
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   650
                    oor = None
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   651
                    while not isinstance(p, Select):
6929
e9464d975908 [rql2sql] fix bug with NOT in "fake" having terms
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6493
diff changeset
   652
                        if isinstance(p, (Or, Not)):
5782
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   653
                            oor = p
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   654
                        p = p.parent
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   655
                    if oor is not None:
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   656
                        ors.add(oor)
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   657
                    break
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   658
            else:
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   659
                tocheck.append(compnode)
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   660
        # tocheck hold a set of comparison not implying an aggregat function
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   661
        # put them in fakehaving if the don't share an Or node as ancestor
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   662
        # with another comparison containing an aggregat function
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   663
        for compnode in tocheck:
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   664
            parents = set()
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   665
            p = compnode.parent
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   666
            oor = None
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   667
            while not isinstance(p, Select):
5887
3f55f0f10a22 [rql2sql] test and fix crash when OR in HAVING where both expresion are 'fake' having terms (eg not using aggregat function)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5844
diff changeset
   668
                if p in ors or p is None: # p is None for nodes already in fakehaving
5782
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   669
                    break
6929
e9464d975908 [rql2sql] fix bug with NOT in "fake" having terms
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6493
diff changeset
   670
                if isinstance(p, (Or, Not)):
5782
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   671
                    oor = p
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   672
                p = p.parent
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   673
            else:
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   674
                node = oor or compnode
5887
3f55f0f10a22 [rql2sql] test and fix crash when OR in HAVING where both expresion are 'fake' having terms (eg not using aggregat function)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5844
diff changeset
   675
                fakehaving.append(node)
3f55f0f10a22 [rql2sql] test and fix crash when OR in HAVING where both expresion are 'fake' having terms (eg not using aggregat function)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5844
diff changeset
   676
                node.parent.remove(node)
5782
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   677
    return fakehaving
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
   678
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   679
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   680
class SQLGenerator(object):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   681
    """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   682
    generation of SQL from the fully expanded RQL syntax tree
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   683
    SQL is designed to be used with a CubicWeb SQL schema
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   684
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   685
    Groups and sort are not handled here since they should not be handled at
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   686
    this level (see cubicweb.server.querier)
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
   687
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   688
    we should not have errors here !
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   689
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   690
    WARNING: a CubicWebSQLGenerator instance is not thread safe, but generate is
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   691
    protected by a lock
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   692
    """
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
   693
5010
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
   694
    def __init__(self, schema, dbhelper, attrmap=None):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   695
        self.schema = schema
5010
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
   696
        self.dbhelper = dbhelper
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
   697
        self.dbencoding = dbhelper.dbencoding
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
   698
        self.keyword_map = {'NOW' : self.dbhelper.sql_current_timestamp,
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
   699
                            'TODAY': self.dbhelper.sql_current_date,
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   700
                            }
5010
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
   701
        if not self.dbhelper.union_parentheses_support:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   702
            self.union_sql = self.noparen_union_sql
5010
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
   703
        if self.dbhelper.fti_need_distinct:
4836
3e3c4917e94e [sql generation] fti_need_distinct quere was not anymore used, potentially causing duplicates on has_text queries with sqlite backend
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4794
diff changeset
   704
            self.__union_sql = self.union_sql
3e3c4917e94e [sql generation] fti_need_distinct quere was not anymore used, potentially causing duplicates on has_text queries with sqlite backend
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4794
diff changeset
   705
            self.union_sql = self.has_text_need_distinct_union_sql
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   706
        self._lock = threading.Lock()
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
   707
        if attrmap is None:
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
   708
            attrmap = {}
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
   709
        self.attr_map = attrmap
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
   710
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   711
    def generate(self, union, args=None, varmap=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   712
        """return SQL queries and a variable dictionnary from a RQL syntax tree
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   713
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   714
        :partrqls: a list of couple (rqlst, solutions)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   715
        :args: optional dictionary with values of substitutions used in the query
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   716
        :varmap: optional dictionary mapping variable name to a special table
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   717
          name, in case the query as to fetch data from temporary tables
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   718
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   719
        return an sql string and a dictionary with substitutions values
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   720
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   721
        if args is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   722
            args = {}
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   723
        if varmap is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   724
            varmap =  {}
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   725
        self._lock.acquire()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   726
        self._args = args
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   727
        self._varmap = varmap
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   728
        self._query_attrs = {}
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   729
        self._state = None
5582
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   730
        # self._not_scope_offset = 0
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   731
        try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   732
            # union query for each rqlst / solution
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   733
            sql = self.union_sql(union)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   734
            # we are done
5013
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   735
            return sql, self._query_attrs, self._state.needs_source_cb
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   736
        finally:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   737
            self._lock.release()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   738
4836
3e3c4917e94e [sql generation] fti_need_distinct quere was not anymore used, potentially causing duplicates on has_text queries with sqlite backend
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4794
diff changeset
   739
    def has_text_need_distinct_union_sql(self, union, needalias=False):
3e3c4917e94e [sql generation] fti_need_distinct quere was not anymore used, potentially causing duplicates on has_text queries with sqlite backend
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4794
diff changeset
   740
        if getattr(union, 'has_text_query', False):
3e3c4917e94e [sql generation] fti_need_distinct quere was not anymore used, potentially causing duplicates on has_text queries with sqlite backend
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4794
diff changeset
   741
            for select in union.children:
3e3c4917e94e [sql generation] fti_need_distinct quere was not anymore used, potentially causing duplicates on has_text queries with sqlite backend
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4794
diff changeset
   742
                select.need_distinct = True
3e3c4917e94e [sql generation] fti_need_distinct quere was not anymore used, potentially causing duplicates on has_text queries with sqlite backend
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4794
diff changeset
   743
        return self.__union_sql(union, needalias)
3e3c4917e94e [sql generation] fti_need_distinct quere was not anymore used, potentially causing duplicates on has_text queries with sqlite backend
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4794
diff changeset
   744
6491
ee9a10b6620e pylint option update
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6297
diff changeset
   745
    def union_sql(self, union, needalias=False): # pylint: disable=E0202
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   746
        if len(union.children) == 1:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   747
            return self.select_sql(union.children[0], needalias)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   748
        sqls = ('(%s)' % self.select_sql(select, needalias)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   749
                for select in union.children)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   750
        return '\nUNION ALL\n'.join(sqls)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   751
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   752
    def noparen_union_sql(self, union, needalias=False):
5010
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
   753
        # needed for sqlite backend which doesn't like parentheses around union
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
   754
        # query. This may cause bug in some condition (sort in one of the
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
   755
        # subquery) but will work in most case
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
   756
        #
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   757
        # see http://www.sqlite.org/cvstrac/tktview?tn=3074
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   758
        sqls = (self.select_sql(select, needalias)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   759
                for i, select in enumerate(union.children))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   760
        return '\nUNION ALL\n'.join(sqls)
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
   761
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   762
    def select_sql(self, select, needalias=False):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   763
        """return SQL queries and a variable dictionnary from a RQL syntax tree
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   764
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   765
        :select: a selection statement of the syntax tree (`rql.stmts.Select`)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   766
        :solution: a dictionnary containing variables binding.
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   767
          A solution's dictionnary has variable's names as key and variable's
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   768
          types as values
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   769
        :needwrap: boolean telling if the query will be wrapped in an outer
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   770
          query (to deal with aggregat and/or grouping)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   771
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   772
        distinct = selectsortterms = select.need_distinct
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   773
        sorts = select.orderby
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   774
        groups = select.groupby
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   775
        having = select.having
5782
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   776
        morerestr = extract_fake_having_terms(having)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   777
        # remember selection, it may be changed and have to be restored
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   778
        origselection = select.selection[:]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   779
        # check if the query will have union subquery, if it need sort term
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   780
        # selection (union or distinct query) and wrapping (union with groups)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   781
        needwrap = False
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   782
        sols = select.solutions
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   783
        if len(sols) > 1:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   784
            # remove invariant from solutions
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   785
            sols, existssols, unstable = remove_unused_solutions(
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   786
                select, sols, self._varmap, self.schema)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   787
            if len(sols) > 1:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   788
                # if there is still more than one solution, a UNION will be
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   789
                # generated and so sort terms have to be selected
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   790
                selectsortterms = True
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   791
                # and if select is using group by or aggregat, a wrapping
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   792
                # query will be necessary
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   793
                if groups or select.has_aggregat:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   794
                    select.select_only_variables()
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
   795
                    needwrap = True
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   796
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   797
            existssols, unstable = {}, ()
5582
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   798
        state = StateInfo(select, existssols, unstable)
5013
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   799
        if self._state is not None:
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   800
            # state from a previous unioned select
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   801
            state.merge_source_cbs(self._state.needs_source_cb)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   802
        # treat subqueries
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   803
        self._subqueries_sql(select, state)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   804
        # generate sql for this select node
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   805
        selectidx = [str(term) for term in select.selection]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   806
        if needwrap:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   807
            outerselection = origselection[:]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   808
            if sorts and selectsortterms:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   809
                outerselectidx = [str(term) for term in outerselection]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   810
                if distinct:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   811
                    sort_term_selection(sorts, outerselectidx,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   812
                                        outerselection, groups)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   813
            else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   814
                outerselectidx = selectidx[:]
3752
4c77a1653374 when a query is grouped, ensure sort terms are grouped as well
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3736
diff changeset
   815
        fix_selection_and_group(select, selectidx, needwrap,
4c77a1653374 when a query is grouped, ensure sort terms are grouped as well
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3736
diff changeset
   816
                                selectsortterms, sorts, groups, having)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   817
        if needwrap:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   818
            fselectidx = outerselectidx
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   819
            fneedwrap = len(outerselection) != len(origselection)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   820
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   821
            fselectidx = selectidx
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   822
            fneedwrap = len(select.selection) != len(origselection)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   823
        if fneedwrap:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   824
            needalias = True
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   825
        self._in_wrapping_query = False
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   826
        self._state = state
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   827
        try:
5782
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   828
            sql = self._solutions_sql(select, morerestr, sols, distinct,
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   829
                                      needalias or needwrap)
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   830
            # generate groups / having before wrapping query selection to get
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   831
            # correct column aliases
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   832
            self._in_wrapping_query = needwrap
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   833
            if groups:
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   834
                # no constant should be inserted in GROUP BY else the backend
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   835
                # will interpret it as a positional index in the selection
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   836
                groups = ','.join(vref.accept(self) for vref in groups
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   837
                                  if not isinstance(vref, Constant))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   838
            if having:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   839
                # filter out constants as for GROUP BY
5662
785837baabba HAVING sql clause don't know about comma...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5635
diff changeset
   840
                having = ' AND '.join(term.accept(self) for term in having
785837baabba HAVING sql clause don't know about comma...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5635
diff changeset
   841
                                      if not isinstance(term, Constant))
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   842
            if needwrap:
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   843
                sql = '%s FROM (%s) AS T1' % (
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   844
                    self._selection_sql(outerselection, distinct,needalias),
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   845
                    sql)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   846
            if groups:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   847
                sql += '\nGROUP BY %s' % groups
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   848
            if having:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   849
                sql += '\nHAVING %s' % having
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   850
            # sort
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   851
            if sorts:
7108
bcdf22734059 Abstract the support for ORDER BY and LIMIT/OFFSET SQL generation
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents: 7042
diff changeset
   852
                sqlsortterms = []
bcdf22734059 Abstract the support for ORDER BY and LIMIT/OFFSET SQL generation
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents: 7042
diff changeset
   853
                for sortterm in sorts:
bcdf22734059 Abstract the support for ORDER BY and LIMIT/OFFSET SQL generation
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents: 7042
diff changeset
   854
                    _term = self._sortterm_sql(sortterm, fselectidx)
bcdf22734059 Abstract the support for ORDER BY and LIMIT/OFFSET SQL generation
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents: 7042
diff changeset
   855
                    if _term is not None:
bcdf22734059 Abstract the support for ORDER BY and LIMIT/OFFSET SQL generation
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents: 7042
diff changeset
   856
                        sqlsortterms.append(_term)
5768
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   857
                if sqlsortterms:
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   858
                    sql = self.dbhelper.sql_add_order_by(
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   859
                        sql, sqlsortterms, origselection, fneedwrap,
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   860
                        select.limit or select.offset)
7108
bcdf22734059 Abstract the support for ORDER BY and LIMIT/OFFSET SQL generation
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents: 7042
diff changeset
   861
            else:
bcdf22734059 Abstract the support for ORDER BY and LIMIT/OFFSET SQL generation
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents: 7042
diff changeset
   862
                sqlsortterms = None
5013
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   863
            state.finalize_source_cbs()
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   864
        finally:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   865
            select.selection = origselection
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   866
        # limit / offset
7108
bcdf22734059 Abstract the support for ORDER BY and LIMIT/OFFSET SQL generation
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents: 7042
diff changeset
   867
        sql = self.dbhelper.sql_add_limit_offset(sql,
bcdf22734059 Abstract the support for ORDER BY and LIMIT/OFFSET SQL generation
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents: 7042
diff changeset
   868
                                                 select.limit,
bcdf22734059 Abstract the support for ORDER BY and LIMIT/OFFSET SQL generation
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents: 7042
diff changeset
   869
                                                 select.offset,
bcdf22734059 Abstract the support for ORDER BY and LIMIT/OFFSET SQL generation
Alexandre Fayolle <alexandre.fayolle@logilab.fr>
parents: 7042
diff changeset
   870
                                                 sqlsortterms)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   871
        return sql
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   872
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   873
    def _subqueries_sql(self, select, state):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   874
        for i, subquery in enumerate(select.with_):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   875
            sql = self.union_sql(subquery.query, needalias=True)
5010
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
   876
            tablealias = '_T%s' % i # XXX nested subqueries
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   877
            sql = '(%s) AS %s' % (sql, tablealias)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   878
            state.subtables[tablealias] = (0, sql)
5013
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   879
            latest_state = self._state
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   880
            for vref in subquery.aliases:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   881
                alias = vref.variable
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   882
                alias._q_sqltable = tablealias
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   883
                alias._q_sql = '%s.C%s' % (tablealias, alias.colnum)
5013
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   884
                try:
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   885
                    stack = latest_state.needs_source_cb[alias.colnum]
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   886
                    if state.subquery_source_cb is None:
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   887
                        state.subquery_source_cb = {}
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   888
                    for selectidx, vref in iter_mapped_var_sels(select, alias):
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   889
                        stack = stack[:]
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   890
                        update_source_cb_stack(state, select, vref, stack)
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   891
                        state.subquery_source_cb[selectidx] = stack
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   892
                except KeyError:
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   893
                    continue
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   894
5782
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   895
    def _solutions_sql(self, select, morerestr, solutions, distinct, needalias):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   896
        sqls = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   897
        for solution in solutions:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   898
            self._state.reset(solution)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   899
            # visit restriction subtree
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   900
            if select.where is not None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   901
                self._state.add_restriction(select.where.accept(self))
5782
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   902
            for restriction in morerestr:
8ff48d1a319f [rql2sql] when using HAVING to by-pass rql limitation (not to filter on result of an aggregat function), we should emit SQL that doesn't use HAVING to avoid potential backend error because variables are not grouped. Closes #1061603.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   903
                self._state.add_restriction(restriction.accept(self))
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   904
            sql = [self._selection_sql(select.selection, distinct, needalias)]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   905
            if self._state.restrictions:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   906
                sql.append('WHERE %s' % ' AND '.join(self._state.restrictions))
5013
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
   907
            self._state.merge_source_cbs(self._state._needs_source_cb)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   908
            # add required tables
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   909
            assert len(self._state.actual_tables) == 1, self._state.actual_tables
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   910
            tables = self._state.tables_sql()
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   911
            if tables:
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   912
                sql.insert(1, 'FROM %s' % tables)
5010
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
   913
            elif self._state.restrictions and self.dbhelper.needs_from_clause:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   914
                sql.insert(1, 'FROM (SELECT 1) AS _T')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   915
            sqls.append('\n'.join(sql))
5582
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   916
        if distinct:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   917
            return '\nUNION\n'.join(sqls)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   918
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   919
            return '\nUNION ALL\n'.join(sqls)
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
   920
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   921
    def _selection_sql(self, selected, distinct, needaliasing=False):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   922
        clause = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   923
        for term in selected:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   924
            sql = term.accept(self)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   925
            if needaliasing:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   926
                colalias = 'C%s' % len(clause)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   927
                clause.append('%s AS %s' % (sql, colalias))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   928
                if isinstance(term, VariableRef):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   929
                    self._state.aliases[term.name] = colalias
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   930
            else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   931
                clause.append(sql)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   932
        if distinct:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   933
            return 'SELECT DISTINCT %s' % ', '.join(clause)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   934
        return 'SELECT %s' % ', '.join(clause)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   935
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   936
    def _sortterm_sql(self, sortterm, selectidx):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   937
        term = sortterm.term
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   938
        try:
5768
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   939
            sqlterm = selectidx.index(str(term)) + 1
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   940
        except ValueError:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   941
            # Constant node or non selected term
5768
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   942
            sqlterm = term.accept(self)
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   943
            if sqlterm is None:
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   944
                return None
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   945
        if sortterm.asc:
5768
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
   946
            return str(sqlterm)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   947
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   948
            return '%s DESC' % sqlterm
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   949
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   950
    def visit_and(self, et):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   951
        """generate SQL for a AND subtree"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   952
        res = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   953
        for c in et.children:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   954
            part = c.accept(self)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   955
            if part:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   956
                res.append(part)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   957
        return ' AND '.join(res)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   958
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   959
    def visit_or(self, ou):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   960
        """generate SQL for a OR subtree"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   961
        res = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   962
        for c in ou.children:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   963
            part = c.accept(self)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   964
            if part:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   965
                res.append('(%s)' % part)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   966
        if res:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   967
            if len(res) > 1:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   968
                return '(%s)' % ' OR '.join(res)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   969
            return res[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   970
        return ''
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
   971
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   972
    def visit_not(self, node):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   973
        csql = node.children[0].accept(self)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   974
        if node in self._state.done or not csql:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   975
            # already processed or no sql generated by children
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   976
            return csql
5582
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   977
        return 'NOT (%s)' % csql
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   978
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   979
    def visit_exists(self, exists):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   980
        """generate SQL name for a exists subquery"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   981
        sqls = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   982
        for dummy in self._state.iter_exists_sols(exists):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   983
            sql = self._visit_exists(exists)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   984
            if sql:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   985
                sqls.append(sql)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   986
        if not sqls:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   987
            return ''
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   988
        return 'EXISTS(%s)' % ' UNION '.join(sqls)
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
   989
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   990
    def _visit_exists(self, exists):
5582
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   991
        self._state.push_scope(exists)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   992
        restriction = exists.children[0].accept(self)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   993
        restrictions, tables = self._state.pop_scope()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   994
        if restriction:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   995
            restrictions.append(restriction)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   996
        restriction = ' AND '.join(restrictions)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   997
        if not restriction:
6297
23c1e50ff97b [rql] fix bug with query like 'Any 1 WHERE NOT X in_group G': tables should be kept in EXISTS() even when there are no restriction
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6286
diff changeset
   998
            if tables:
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
   999
                return 'SELECT 1 FROM %s' % tables
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1000
            return ''
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1001
        if not tables:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1002
            # XXX could leave surrounding EXISTS() in this case no?
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1003
            sql = 'SELECT 1 WHERE %s' % restriction
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1004
        else:
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1005
            sql = 'SELECT 1 FROM %s WHERE %s' % (tables, restriction)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1006
        return sql
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1007
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1008
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1009
    def visit_relation(self, relation):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1010
        """generate SQL for a relation"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1011
        rtype = relation.r_type
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1012
        # don't care of type constraint statement (i.e. relation_type = 'is')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1013
        if relation.is_types_restriction():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1014
            return ''
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1015
        lhs, rhs = relation.get_parts()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1016
        rschema = self.schema.rschema(rtype)
3689
deb13e88e037 follow yams 0.25 api changes to improve performance
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3245
diff changeset
  1017
        if rschema.final:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1018
            if rtype == 'eid' and lhs.variable._q_invariant and \
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1019
                   lhs.variable.stinfo['constnode']:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1020
                # special case where this restriction is already generated by
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1021
                # some other relation
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1022
                return ''
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1023
            # attribute relation
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1024
            if rtype == 'has_text':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1025
                sql = self._visit_has_text_relation(relation)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1026
            else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1027
                rhs_vars = rhs.get_nodes(VariableRef)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1028
                if rhs_vars:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1029
                    # if variable(s) in the RHS
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1030
                    sql = self._visit_var_attr_relation(relation, rhs_vars)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1031
                else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1032
                    # no variables in the RHS
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1033
                    sql = self._visit_attribute_relation(relation)
5706
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1034
        elif (rtype == 'is' and isinstance(rhs.children[0], Constant)
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1035
              and rhs.children[0].eval(self._args) is None):
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1036
            # special case "C is NULL"
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1037
            if lhs.name in self._varmap:
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1038
                lhssql = self._varmap[lhs.name]
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1039
            else:
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1040
                lhssql = lhs.accept(self)
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1041
            return '%s%s' % (lhssql, rhs.accept(self))
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1042
        elif '%s.%s' % (lhs, relation.r_type) in self._varmap:
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1043
            # relation has already been processed by a previous step
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1044
            return ''
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1045
        elif relation.optional:
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1046
            # OPTIONAL relation, generate a left|right outer join
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1047
            if rtype == 'identity' or rschema.inlined:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1048
                sql = self._visit_outer_join_inlined_relation(relation, rschema)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1049
            else:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1050
                sql = self._visit_outer_join_relation(relation, rschema)
5706
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1051
        elif rschema.inlined:
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1052
            sql = self._visit_inlined_relation(relation)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1053
        else:
5706
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1054
            # regular (non final) relation
c2e8290bc7b7 [rql2sql] fix special 'X relation NULL' case (used by security insertion), broken by recent removal of IS operator in RQL
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5702
diff changeset
  1055
            sql = self._visit_relation(relation, rschema)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1056
        return sql
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1057
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1058
    def _visit_inlined_relation(self, relation):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1059
        lhsvar, _, rhsvar, rhsconst = relation_info(relation)
6003
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1060
        # we are sure lhsvar is not None
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1061
        lhssql = self._inlined_var_sql(lhsvar, relation.r_type)
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1062
        if rhsvar is None:
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1063
            moresql = None
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1064
        else:
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1065
            moresql = self._extra_join_sql(relation, lhssql, rhsvar)
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1066
        if isinstance(relation.parent, Not):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1067
            self._state.done.add(relation.parent)
6003
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1068
            if rhsvar is not None and rhsvar._q_invariant:
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1069
                sql = '%s IS NULL' % lhssql
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1070
            else:
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1071
                # column != 1234 may not get back rows where column is NULL...
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1072
                sql = '(%s IS NULL OR %s!=%s)' % (
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1073
                    lhssql, lhssql, (rhsvar or rhsconst).accept(self))
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1074
        elif rhsconst is not None:
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1075
            sql = '%s=%s' % (lhssql, rhsconst.accept(self))
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1076
        elif isinstance(rhsvar, Variable) and rhsvar._q_invariant and \
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1077
                 not rhsvar.name in self._varmap:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1078
            # if the rhs variable is only linked to this relation, this mean we
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1079
            # only want the relation to exists, eg NOT NULL in case of inlined
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1080
            # relation
6003
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1081
            if moresql is not None:
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1082
                return moresql
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1083
            return '%s IS NOT NULL' % lhssql
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1084
        else:
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1085
            sql = '%s=%s' % (lhssql, rhsvar.accept(self))
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1086
        if moresql is None:
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1087
            return sql
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1088
        return '%s AND %s' % (sql, moresql)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1089
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1090
    def _process_relation_term(self, relation, rid, termvar, termconst, relfield):
4794
81075b09ebf1 [rql2sql] fix potential crash when testing _q_invariant on a ColumnAlias instead of a Variable by always considering _q_invariant to false for them
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4719
diff changeset
  1091
        if termconst or not termvar._q_invariant:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1092
            termsql = termconst and termconst.accept(self) or termvar.accept(self)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1093
            yield '%s.%s=%s' % (rid, relfield, termsql)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1094
        elif termvar._q_invariant:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1095
            # if the variable is mapped, generate restriction anyway
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1096
            if termvar.name in self._varmap:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1097
                termsql = termvar.accept(self)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1098
                yield '%s.%s=%s' % (rid, relfield, termsql)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1099
            extrajoin = self._extra_join_sql(relation, '%s.%s' % (rid, relfield), termvar)
6003
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1100
            if extrajoin is not None:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1101
                yield extrajoin
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1102
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1103
    def _visit_relation(self, relation, rschema):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1104
        """generate SQL for a relation
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1105
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1106
        implements optimization 1.
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1107
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1108
        if relation.r_type == 'identity':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1109
            # special case "X identity Y"
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1110
            lhs, rhs = relation.get_parts()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1111
            return '%s%s' % (lhs.accept(self), rhs.accept(self))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1112
        lhsvar, lhsconst, rhsvar, rhsconst = relation_info(relation)
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1113
        rid = self._state.relation_table(relation)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1114
        sqls = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1115
        sqls += self._process_relation_term(relation, rid, lhsvar, lhsconst, 'eid_from')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1116
        sqls += self._process_relation_term(relation, rid, rhsvar, rhsconst, 'eid_to')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1117
        sql = ' AND '.join(sqls)
4467
0e73d299730a fix long-waiting symetric typo: should be spelled symmetric. Add auto database migration on schema deserialization
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4286
diff changeset
  1118
        if rschema.symmetric:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1119
            sql = '(%s OR %s)' % (sql, switch_relation_field(sql))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1120
        return sql
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1121
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1122
    def _visit_outer_join_relation(self, relation, rschema):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1123
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1124
        left outer join syntax (optional=='right'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1125
          X relation Y?
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1126
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1127
        right outer join syntax (optional=='left'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1128
          X? relation Y
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1129
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1130
        full outer join syntaxes (optional=='both'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1131
          X? relation Y?
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1132
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1133
        if relation is inlined:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1134
           if it's a left outer join:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1135
           -> X LEFT OUTER JOIN Y ON (X.relation=Y.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1136
           elif it's a right outer join:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1137
           -> Y LEFT OUTER JOIN X ON (X.relation=Y.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1138
           elif it's a full outer join:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1139
           -> X FULL OUTER JOIN Y ON (X.relation=Y.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1140
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1141
           if it's a left outer join:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1142
           -> X LEFT OUTER JOIN relation ON (relation.eid_from=X.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1143
              LEFT OUTER JOIN Y ON (relation.eid_to=Y.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1144
           elif it's a right outer join:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1145
           -> Y LEFT OUTER JOIN relation ON (relation.eid_to=Y.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1146
              LEFT OUTER JOIN X ON (relation.eid_from=X.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1147
           elif it's a full outer join:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1148
           -> X FULL OUTER JOIN Y ON (X.relation=Y.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1149
        """
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1150
        leftvar, leftconst, rightvar, rightconst = relation_info(relation)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1151
        assert not (leftconst and rightconst), "doesn't make sense"
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1152
        if relation.optional == 'left':
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1153
            leftvar, rightvar = rightvar, leftvar
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1154
            leftconst, rightconst = rightconst, leftconst
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1155
            joinattr, restrattr = 'eid_to', 'eid_from'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1156
        else:
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1157
            joinattr, restrattr = 'eid_from', 'eid_to'
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1158
        # search table for this variable, to use as left table of the outer join
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1159
        leftalias = None
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1160
        if leftvar:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1161
            # take care, may return None for invariant variable
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1162
            leftalias = self._var_table(leftvar)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1163
        if leftalias is None:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1164
            if leftvar.stinfo['principal'] is not relation:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1165
                # use variable's principal relation
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1166
                leftalias = leftvar.stinfo['principal']._q_sqltable
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1167
            else:
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1168
                # search for relation on which we should join
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1169
                for orelation in leftvar.stinfo['relations']:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1170
                    if (orelation is not relation and
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1171
                        not self.schema.rschema(orelation.r_type).final):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1172
                        break
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1173
                else:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1174
                    for orelation in rightvar.stinfo['relations']:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1175
                        if (orelation is not relation and
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1176
                            not self.schema.rschema(orelation.r_type).final
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1177
                            and orelation.optional):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1178
                            break
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1179
                    else:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1180
                        # unexpected
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1181
                        assert False, leftvar
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1182
                leftalias = self._state.relation_table(orelation)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1183
        # right table of the outer join
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1184
        rightalias = self._state.relation_table(relation)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1185
        # compute join condition
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1186
        if not leftconst or (leftvar and not leftvar._q_invariant):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1187
            leftsql = leftvar.accept(self)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1188
        else:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1189
            leftsql = leftconst.accept(self)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1190
        condition = '%s.%s=%s' % (rightalias, joinattr, leftsql)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1191
        if rightconst:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1192
            condition += ' AND %s.%s=%s' % (rightalias, restrattr, rightconst.accept(self))
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1193
        # record outer join
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1194
        outertype = 'FULL' if relation.optional == 'both' else 'LEFT'
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1195
        self._state.replace_tables_by_outer_join(leftalias, rightalias,
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1196
                                                 outertype, condition)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1197
        # need another join?
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1198
        if rightconst is None:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1199
            # we need another outer join for the other side of the relation (e.g.
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1200
            # for "X relation Y?" in RQL, we treated earlier the (cw_X.eid /
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1201
            # relation.eid_from) join, now we've to do (relation.eid_to /
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1202
            # cw_Y.eid)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1203
            leftalias = rightalias
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1204
            rightsql = rightvar.accept(self) # accept before using var_table
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1205
            rightalias = self._var_table(rightvar)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1206
            if rightalias is None:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1207
                if rightvar.stinfo['principal'] is not relation:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1208
                    self._state.replace_tables_by_outer_join(
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1209
                        leftalias, rightvar.stinfo['principal']._q_sqltable,
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1210
                        outertype, '%s.%s=%s' % (leftalias, restrattr, rightvar.accept(self)))
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1211
            else:
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1212
                self._state.replace_tables_by_outer_join(
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1213
                    leftalias, rightalias, outertype,
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1214
                    '%s.%s=%s' % (leftalias, restrattr, rightvar.accept(self)))
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1215
        # this relation will hence be expressed in FROM clause, return nothing
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1216
        # here
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1217
        return ''
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1218
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1219
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1220
    def _visit_outer_join_inlined_relation(self, relation, rschema):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1221
        leftvar, leftconst, rightvar, rightconst = relation_info(relation)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1222
        assert not (leftconst and rightconst), "doesn't make sense"
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1223
        if relation.optional != 'right':
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1224
            leftvar, rightvar = rightvar, leftvar
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1225
            leftconst, rightconst = rightconst, leftconst
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1226
        outertype = 'FULL' if relation.optional == 'both' else 'LEFT'
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1227
        leftalias = self._var_table(leftvar)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1228
        attr = 'eid' if relation.r_type == 'identity' else relation.r_type
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1229
        lhs, rhs = relation.get_variable_parts()
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1230
        try:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1231
            lhssql = self._varmap['%s.%s' % (lhs.name, attr)]
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1232
        except KeyError:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1233
            lhssql = '%s.%s%s' % (self._var_table(lhs.variable), SQL_PREFIX, attr)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1234
        if rightvar is not None:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1235
            rightalias = self._var_table(rightvar)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1236
            if rightalias is None:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1237
                if rightconst is not None:
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1238
                    # inlined relation with invariant as rhs
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1239
                    condition = '%s=%s' % (lhssql, rightconst.accept(self))
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1240
                    if relation.r_type != 'identity':
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1241
                        condition = '(%s OR %s IS NULL)' % (condition, lhssql)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1242
                    if not leftvar.stinfo.get('optrelations'):
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1243
                        return condition
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1244
                    self._state.add_outer_join_condition(leftalias, condition)
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1245
                return
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1246
        self._state.replace_tables_by_outer_join(
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1247
            leftalias, rightalias, outertype, '%s=%s' % (lhssql, rhs.accept(self)))
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1248
        return ''
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1249
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1250
    def _visit_var_attr_relation(self, relation, rhs_vars):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1251
        """visit an attribute relation with variable(s) in the RHS
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1252
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1253
        attribute variables are used either in the selection or for
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1254
        unification (eg X attr1 A, Y attr2 A). In case of selection,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1255
        nothing to do here.
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1256
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1257
        for var in rhs_vars:
2073
173c646981a7 fix missing from close when using a var map
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
  1258
            if var.name in self._varmap:
173c646981a7 fix missing from close when using a var map
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
  1259
                # ensure table is added
173c646981a7 fix missing from close when using a var map
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
  1260
                self._var_info(var.variable)
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1261
            principal = var.variable.stinfo.get('principal')
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1262
            if principal is not None and principal is not relation:
6940
1172c25655b7 [rql2sql] should not select a neged relation as principal + simplify code for sql generation for attribute relation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6929
diff changeset
  1263
                # we have to generate unification expression
1172c25655b7 [rql2sql] should not select a neged relation as principal + simplify code for sql generation for attribute relation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6929
diff changeset
  1264
                lhssql = self._inlined_var_sql(relation.children[0].variable,
1172c25655b7 [rql2sql] should not select a neged relation as principal + simplify code for sql generation for attribute relation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6929
diff changeset
  1265
                                               relation.r_type)
1172c25655b7 [rql2sql] should not select a neged relation as principal + simplify code for sql generation for attribute relation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6929
diff changeset
  1266
                try:
1172c25655b7 [rql2sql] should not select a neged relation as principal + simplify code for sql generation for attribute relation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6929
diff changeset
  1267
                    self._state.ignore_varmap = True
1172c25655b7 [rql2sql] should not select a neged relation as principal + simplify code for sql generation for attribute relation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6929
diff changeset
  1268
                    return '%s%s' % (lhssql, relation.children[1].accept(self))
1172c25655b7 [rql2sql] should not select a neged relation as principal + simplify code for sql generation for attribute relation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6929
diff changeset
  1269
                finally:
1172c25655b7 [rql2sql] should not select a neged relation as principal + simplify code for sql generation for attribute relation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6929
diff changeset
  1270
                    self._state.ignore_varmap = False
1172c25655b7 [rql2sql] should not select a neged relation as principal + simplify code for sql generation for attribute relation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6929
diff changeset
  1271
        return ''
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1272
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1273
    def _visit_attribute_relation(self, rel):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1274
        """generate SQL for an attribute relation"""
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1275
        lhs, rhs = rel.get_parts()
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1276
        rhssql = rhs.accept(self)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1277
        table = self._var_table(lhs.variable)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1278
        if table is None:
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1279
            assert rel.r_type == 'eid'
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1280
            lhssql = lhs.accept(self)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1281
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1282
            try:
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1283
                lhssql = self._varmap['%s.%s' % (lhs.name, rel.r_type)]
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1284
            except KeyError:
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1285
                mapkey = '%s.%s' % (self._state.solution[lhs.name], rel.r_type)
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1286
                if mapkey in self.attr_map:
5013
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1287
                    cb, sourcecb = self.attr_map[mapkey]
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1288
                    if sourcecb:
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1289
                        # callback is a source callback, we can't use this
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1290
                        # attribute in restriction
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1291
                        raise QueryError("can't use %s (%s) in restriction"
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1292
                                         % (mapkey, rel.as_string()))
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1293
                    lhssql = cb(self, lhs.variable, rel)
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1294
                elif rel.r_type == 'eid':
1251
af40e615dc89 introduce a 'cw_' prefix on entity table and column names so we don't conflict with sql or DBMS specific keywords
sylvain.thenault@logilab.fr
parents: 1124
diff changeset
  1295
                    lhssql = lhs.variable._q_sql
af40e615dc89 introduce a 'cw_' prefix on entity table and column names so we don't conflict with sql or DBMS specific keywords
sylvain.thenault@logilab.fr
parents: 1124
diff changeset
  1296
                else:
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1297
                    lhssql = '%s.%s%s' % (table, SQL_PREFIX, rel.r_type)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1298
        try:
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1299
            if rel._q_needcast == 'TODAY':
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1300
                sql = 'DATE(%s)%s' % (lhssql, rhssql)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1301
            # XXX which cast function should be used
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1302
            #elif rel._q_needcast == 'NOW':
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1303
            #    sql = 'TIMESTAMP(%s)%s' % (lhssql, rhssql)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1304
            else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1305
                sql = '%s%s' % (lhssql, rhssql)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1306
        except AttributeError:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1307
            sql = '%s%s' % (lhssql, rhssql)
5004
4cc020ee70e2 le patch rql26 a été importé
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
  1308
        if lhs.variable.stinfo.get('optrelations'):
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1309
            self._state.add_outer_join_condition(table, sql)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1310
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1311
            return sql
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1312
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1313
    def _visit_has_text_relation(self, rel):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1314
        """generate SQL for a has_text relation"""
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1315
        lhs, rhs = rel.get_parts()
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1316
        const = rhs.children[0]
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1317
        alias = self._state.fti_table(rel, self.dbhelper.fti_table)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1318
        jointo = lhs.accept(self)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1319
        restriction = ''
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1320
        lhsvar = lhs.variable
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1321
        me_is_principal = lhsvar.stinfo.get('principal') is rel
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1322
        if me_is_principal:
5004
4cc020ee70e2 le patch rql26 a été importé
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
  1323
            if lhsvar.stinfo['typerel'] is None:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1324
                # the variable is using the fti table, no join needed
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1325
                jointo = None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1326
            elif not lhsvar.name in self._varmap:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1327
                # join on entities instead of etype's table to get result for
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1328
                # external entities on multisources configurations
3762
e416186fb91c prefix sql aliases for entity table by '_' to avoid pb with variable such as 'AS' (eg a keyword in SQL)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3754
diff changeset
  1329
                ealias = lhsvar._q_sqltable = '_' + lhsvar.name
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1330
                jointo = lhsvar._q_sql = '%s.eid' % ealias
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1331
                self._state.add_table('entities AS %s' % ealias, ealias)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1332
                if not lhsvar._q_invariant or len(lhsvar.stinfo['possibletypes']) == 1:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1333
                    restriction = " AND %s.type='%s'" % (ealias, self._state.solution[lhs.name])
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1334
                else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1335
                    etypes = ','.join("'%s'" % etype for etype in lhsvar.stinfo['possibletypes'])
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1336
                    restriction = " AND %s.type IN (%s)" % (ealias, etypes)
2354
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1337
        if isinstance(rel.parent, Not):
9b4bac626977 ability to map attributes to something else than usual cw mapping on sql generation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2199
diff changeset
  1338
            self._state.done.add(rel.parent)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1339
            not_ = True
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1340
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1341
            not_ = False
5768
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
  1342
        query = const.eval(self._args)
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
  1343
        return self.dbhelper.fti_restriction_sql(alias, query,
5582
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
  1344
                                                 jointo, not_) + restriction
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1345
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1346
    def visit_comparison(self, cmp):
3787
82bb2c7f083b C - fix typo. make `lgp check` happy.
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 3762
diff changeset
  1347
        """generate SQL for a comparison"""
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1348
        if len(cmp.children) == 2:
1862
94dc8ccd320b #343322: should generate IS NULL in sql w/ None values in substitution
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1802
diff changeset
  1349
            # XXX occurs ?
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1350
            lhs, rhs = cmp.children
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1351
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1352
            lhs = None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1353
            rhs = cmp.children[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1354
        operator = cmp.operator
5702
9fb240cf0f61 [rql] more update to 0.26.2 api
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5662
diff changeset
  1355
        if operator in ('LIKE', 'ILIKE'):
5010
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
  1356
            if operator == 'ILIKE' and not self.dbhelper.ilike_support:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1357
                operator = ' LIKE '
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1358
            else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1359
                operator = ' %s ' % operator
1862
94dc8ccd320b #343322: should generate IS NULL in sql w/ None values in substitution
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1802
diff changeset
  1360
        elif (operator == '=' and isinstance(rhs, Constant)
94dc8ccd320b #343322: should generate IS NULL in sql w/ None values in substitution
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1802
diff changeset
  1361
              and rhs.eval(self._args) is None):
94dc8ccd320b #343322: should generate IS NULL in sql w/ None values in substitution
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1802
diff changeset
  1362
            if lhs is None:
94dc8ccd320b #343322: should generate IS NULL in sql w/ None values in substitution
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1802
diff changeset
  1363
                return ' IS NULL'
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1364
            return '%s IS NULL' % lhs.accept(self)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1365
        elif isinstance(rhs, Function) and rhs.name == 'IN':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1366
            assert operator == '='
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1367
            operator = ' '
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1368
        if lhs is None:
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1369
            return '%s%s'% (operator, rhs.accept(self))
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1370
        return '%s%s%s'% (lhs.accept(self), operator, rhs.accept(self))
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1371
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1372
    def visit_mathexpression(self, mexpr):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1373
        """generate SQL for a mathematic expression"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1374
        lhs, rhs = mexpr.get_parts()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1375
        # check for string concatenation
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1376
        operator = mexpr.operator
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1377
        try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1378
            if mexpr.operator == '+' and mexpr.get_type(self._state.solution, self._args) == 'String':
5793
1faff41593df [rql2sql] use new dbhelper.sql_concat_string function to deal with sql string concatenation. This together with lgdb 1.0.4 fixes #1055133: SQL Server support : string concatenation issue
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5782
diff changeset
  1379
                return '(%s)' % self.dbhelper.sql_concat_string(lhs.accept(self),
1faff41593df [rql2sql] use new dbhelper.sql_concat_string function to deal with sql string concatenation. This together with lgdb 1.0.4 fixes #1055133: SQL Server support : string concatenation issue
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5782
diff changeset
  1380
                                                                rhs.accept(self))
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1381
        except CoercionError:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1382
            pass
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1383
        return '(%s %s %s)'% (lhs.accept(self), operator, rhs.accept(self))
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1384
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1385
    def visit_function(self, func):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1386
        """generate SQL name for a function"""
5768
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
  1387
        if func.name == 'FTIRANK':
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
  1388
            try:
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
  1389
                rel = iter(func.children[0].variable.stinfo['ftirels']).next()
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
  1390
            except KeyError:
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
  1391
                raise BadRQLQuery("can't use FTIRANK on variable not used in an"
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
  1392
                                  " 'has_text' relation (eg full-text search)")
1e73a466aa69 [fti] support for fti ranking: has_text query results sorted by relevance, and provides a way to control weight per entity / entity's attribute
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5706
diff changeset
  1393
            const = rel.get_parts()[1].children[0]
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1394
            return self.dbhelper.fti_rank_order(
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1395
                self._state.fti_table(rel, self.dbhelper.fti_table),
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1396
                const.eval(self._args))
5013
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1397
        args = [c.accept(self) for c in func.children]
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1398
        if func in self._state.source_cb_funcs:
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1399
            # function executed as a callback on the source
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1400
            assert len(args) == 1
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1401
            return args[0]
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1402
        # func_as_sql will check function is supported by the backend
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1403
        return self.dbhelper.func_as_sql(func.name, args)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1404
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1405
    def visit_constant(self, constant):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1406
        """generate SQL name for a constant"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1407
        if constant.type is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1408
            return 'NULL'
6286
4d10e9895679 cleanup
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6131
diff changeset
  1409
        value = constant.value
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1410
        if constant.type == 'Int' and  isinstance(constant.parent, SortTerm):
6286
4d10e9895679 cleanup
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6131
diff changeset
  1411
            return value
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1412
        if constant.type in ('Date', 'Datetime'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1413
            rel = constant.relation()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1414
            if rel is not None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1415
                rel._q_needcast = value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1416
            return self.keyword_map[value]()
1497
54fc5cc52210 use dbmshelper to generate correct boolean value in rql2sql
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1382
diff changeset
  1417
        if constant.type == 'Boolean':
5010
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
  1418
            value = self.dbhelper.boolean_value(value)
4124
8f2f5f0a89e7 fix backout
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4121
diff changeset
  1419
        if constant.type == 'Substitute':
6131
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1420
            try:
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1421
                # we may found constant from simplified var in varmap
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1422
                return self._mapped_term(constant, '%%(%s)s' % value)[0]
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1423
            except KeyError:
6286
4d10e9895679 cleanup
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6131
diff changeset
  1424
                _id = value
6131
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1425
                if isinstance(_id, unicode):
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1426
                    _id = _id.encode()
7166
dde161937d3e [time zone] support for TZDatetime and TZTime data type
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1427
                # convert timestamp to utc.
dde161937d3e [time zone] support for TZDatetime and TZTime data type
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1428
                # expect SET TiME ZONE to UTC at connection opening time.
dde161937d3e [time zone] support for TZDatetime and TZTime data type
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1429
                # This shouldn't change anything for datetime without TZ.
dde161937d3e [time zone] support for TZDatetime and TZTime data type
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1430
                value = self._args[_id]
dde161937d3e [time zone] support for TZDatetime and TZTime data type
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1431
                if isinstance(value, datetime) and value.tzinfo is not None:
dde161937d3e [time zone] support for TZDatetime and TZTime data type
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1432
                    self._query_attrs[_id] = utcdatetime(value)
dde161937d3e [time zone] support for TZDatetime and TZTime data type
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1433
                elif isinstance(value, time) and value.tzinfo is not None:
dde161937d3e [time zone] support for TZDatetime and TZTime data type
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1434
                    self._query_attrs[_id] = utctime(value)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1435
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1436
            _id = str(id(constant)).replace('-', '', 1)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1437
            self._query_attrs[_id] = value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1438
        return '%%(%s)s' % _id
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1439
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1440
    def visit_variableref(self, variableref):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1441
        """get the sql name for a variable reference"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1442
        # use accept, .variable may be a variable or a columnalias
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1443
        return variableref.variable.accept(self)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1444
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1445
    def visit_columnalias(self, colalias):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1446
        """get the sql name for a subquery column alias"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1447
        if colalias.name in self._varmap:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1448
            sql = self._varmap[colalias.name]
1122
9f37de24251f fix rql2sq w/ outer join on subquery result
sylvain.thenault@logilab.fr
parents: 438
diff changeset
  1449
            table = sql.split('.', 1)[0]
9f37de24251f fix rql2sq w/ outer join on subquery result
sylvain.thenault@logilab.fr
parents: 438
diff changeset
  1450
            colalias._q_sqltable = table
9f37de24251f fix rql2sq w/ outer join on subquery result
sylvain.thenault@logilab.fr
parents: 438
diff changeset
  1451
            colalias._q_sql = sql
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1452
            self._state.add_table(table)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1453
            return sql
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1454
        return colalias._q_sql
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1455
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1456
    def visit_variable(self, variable):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1457
        """get the table name and sql string for a variable"""
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1458
        #if contextrels is None and variable.name in self._state.done:
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1459
        if variable.name in self._state.done:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1460
            if self._in_wrapping_query:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1461
                return 'T1.%s' % self._state.aliases[variable.name]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1462
            return variable._q_sql
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1463
        self._state.done.add(variable.name)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1464
        vtablename = None
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1465
        if not self._state.ignore_varmap and variable.name in self._varmap:
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1466
            sql, vtablename = self._var_info(variable)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1467
        elif variable.stinfo['attrvar']:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1468
            # attribute variable (systematically used in rhs of final
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1469
            # relation(s)), get table name and sql from any rhs relation
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1470
            sql = self._linked_var_sql(variable)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1471
        elif variable._q_invariant:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1472
            # since variable is invariant, we know we won't found final relation
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1473
            principal = variable.stinfo['principal']
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1474
            if principal is None:
3762
e416186fb91c prefix sql aliases for entity table by '_' to avoid pb with variable such as 'AS' (eg a keyword in SQL)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3754
diff changeset
  1475
                vtablename = '_' + variable.name
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1476
                self._state.add_table('entities AS %s' % vtablename, vtablename)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1477
                sql = '%s.eid' % vtablename
5004
4cc020ee70e2 le patch rql26 a été importé
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
  1478
                if variable.stinfo['typerel'] is not None:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1479
                    # add additional restriction on entities.type column
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1480
                    pts = variable.stinfo['possibletypes']
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1481
                    if len(pts) == 1:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1482
                        etype = iter(variable.stinfo['possibletypes']).next()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1483
                        restr = "%s.type='%s'" % (vtablename, etype)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1484
                    else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1485
                        etypes = ','.join("'%s'" % et for et in pts)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1486
                        restr = '%s.type IN (%s)' % (vtablename, etypes)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1487
                    self._state.add_restriction(restr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1488
            elif principal.r_type == 'has_text':
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1489
                sql = '%s.%s' % (self._state.fti_table(principal,
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1490
                                                       self.dbhelper.fti_table),
5010
b2c5aee8ca3f [cleanup] rename dbms_helper to dbhelper for consistency
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4845
diff changeset
  1491
                                 self.dbhelper.fti_uid_attr)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1492
            elif principal in variable.stinfo['rhsrelations']:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1493
                if self.schema.rschema(principal.r_type).inlined:
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1494
                    sql = self._linked_var_sql(variable)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1495
                else:
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1496
                    sql = '%s.eid_to' % self._state.relation_table(principal)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1497
            else:
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1498
                sql = '%s.eid_from' % self._state.relation_table(principal)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1499
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1500
            # standard variable: get table name according to etype and use .eid
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1501
            # attribute
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1502
            sql, vtablename = self._var_info(variable)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1503
        variable._q_sqltable = vtablename
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1504
        variable._q_sql = sql
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1505
        return sql
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1506
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1507
    # various utilities #######################################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1508
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1509
    def _extra_join_sql(self, relation, sql, var):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1510
        # if rhs var is invariant, and this relation is not its principal,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1511
        # generate extra join
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1512
        try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1513
            if not var.stinfo['principal'] is relation:
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1514
                op = relation.operator()
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1515
                if op == '=':
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1516
                    # need a predicable result for tests
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1517
                    args = sorted( (sql, var.accept(self)) )
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1518
                    args.insert(1, op)
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1519
                else:
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1520
                    args = (sql, op, var.accept(self))
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1521
                return '%s%s%s' % tuple(args)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1522
        except KeyError:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1523
            # no principal defined, relation is necessarily the principal and
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1524
            # so nothing to return here
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1525
            pass
6003
5fbc1c4c13ff [rql2sql] fix bug with NOT of inlined relation: NULL values are not properly handled and hence some rows won't be returned while the should
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5901
diff changeset
  1526
        return None
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1527
5593
f6c55bec9326 [rql2sql] properly compute scope for variable from temporary tables
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5582
diff changeset
  1528
    def _temp_table_scope(self, select, table):
f6c55bec9326 [rql2sql] properly compute scope for variable from temporary tables
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5582
diff changeset
  1529
        scope = 9999
f6c55bec9326 [rql2sql] properly compute scope for variable from temporary tables
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5582
diff changeset
  1530
        for var, sql in self._varmap.iteritems():
5635
56784e46509f [rql2sql] fix scope computation of variable from temporary table
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5630
diff changeset
  1531
            # skip "attribute variable" in varmap (such 'T.login')
56784e46509f [rql2sql] fix scope computation of variable from temporary table
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5630
diff changeset
  1532
            if not '.' in var and table == sql.split('.', 1)[0]:
5593
f6c55bec9326 [rql2sql] properly compute scope for variable from temporary tables
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5582
diff changeset
  1533
                try:
f6c55bec9326 [rql2sql] properly compute scope for variable from temporary tables
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5582
diff changeset
  1534
                    scope = min(scope, self._state.scopes[select.defined_vars[var].scope])
f6c55bec9326 [rql2sql] properly compute scope for variable from temporary tables
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5582
diff changeset
  1535
                except KeyError:
f6c55bec9326 [rql2sql] properly compute scope for variable from temporary tables
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5582
diff changeset
  1536
                    scope = 0 # XXX
f6c55bec9326 [rql2sql] properly compute scope for variable from temporary tables
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5582
diff changeset
  1537
                if scope == 0:
5635
56784e46509f [rql2sql] fix scope computation of variable from temporary table
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5630
diff changeset
  1538
                    break
56784e46509f [rql2sql] fix scope computation of variable from temporary table
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5630
diff changeset
  1539
        return scope
5593
f6c55bec9326 [rql2sql] properly compute scope for variable from temporary tables
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5582
diff changeset
  1540
6131
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1541
    def _mapped_term(self, term, key):
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1542
        """return sql and table alias to the `term`, mapped as `key` or raise
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1543
        KeyError when the key is not found in the varmap
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1544
        """
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1545
        sql = self._varmap[key]
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1546
        tablealias = sql.split('.', 1)[0]
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1547
        scope = self._temp_table_scope(term.stmt, tablealias)
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1548
        self._state.add_table(tablealias, scope=scope)
6131
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1549
        return sql, tablealias
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1550
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1551
    def _var_info(self, var):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1552
        try:
6131
087c5a168010 [ms] more planning bug fixes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6050
diff changeset
  1553
            return self._mapped_term(var, var.name)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1554
        except KeyError:
5593
f6c55bec9326 [rql2sql] properly compute scope for variable from temporary tables
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5582
diff changeset
  1555
            scope = self._state.scopes[var.scope]
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1556
            etype = self._state.solution[var.name]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1557
            # XXX this check should be moved in rql.stcheck
3689
deb13e88e037 follow yams 0.25 api changes to improve performance
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3245
diff changeset
  1558
            if self.schema.eschema(etype).final:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1559
                raise BadRQLQuery(var.stmt.root)
3762
e416186fb91c prefix sql aliases for entity table by '_' to avoid pb with variable such as 'AS' (eg a keyword in SQL)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3754
diff changeset
  1560
            tablealias = '_' + var.name
e416186fb91c prefix sql aliases for entity table by '_' to avoid pb with variable such as 'AS' (eg a keyword in SQL)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3754
diff changeset
  1561
            sql = '%s.%seid' % (tablealias, SQL_PREFIX)
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1562
            self._state.add_table('%s%s AS %s' % (SQL_PREFIX, etype, tablealias),
3762
e416186fb91c prefix sql aliases for entity table by '_' to avoid pb with variable such as 'AS' (eg a keyword in SQL)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3754
diff changeset
  1563
                           tablealias, scope=scope)
e416186fb91c prefix sql aliases for entity table by '_' to avoid pb with variable such as 'AS' (eg a keyword in SQL)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3754
diff changeset
  1564
        return sql, tablealias
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1565
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1566
    def _inlined_var_sql(self, var, rtype):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1567
        try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1568
            sql = self._varmap['%s.%s' % (var.name, rtype)]
5582
3e133b29a1a4 [rql2sql] follow rql 0.26.1 changes: NOT nodes normalization, allowing simplification of sql generation, and fix #XXX
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
  1569
            scope = self._state.scopes[var.scope]
7193
7eaef037ea9d [sql generation] fix missing join with outer joins w/ rhs invariant variable...
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7108
diff changeset
  1570
            self._state.add_table(sql.split('.', 1)[0], scope=scope)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1571
        except KeyError:
1251
af40e615dc89 introduce a 'cw_' prefix on entity table and column names so we don't conflict with sql or DBMS specific keywords
sylvain.thenault@logilab.fr
parents: 1124
diff changeset
  1572
            sql = '%s.%s%s' % (self._var_table(var), SQL_PREFIX, rtype)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1573
            #self._state.done.add(var.name)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1574
        return sql
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1575
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1576
    def _linked_var_sql(self, variable):
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1577
        if not self._state.ignore_varmap:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1578
            try:
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1579
                return self._varmap[variable.name]
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1580
            except KeyError:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1581
                pass
3815
50b87f759b5d test and fix http://www.logilab.org/ticket/499838
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3787
diff changeset
  1582
        rel = (variable.stinfo.get('principal') or
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1583
               iter(variable.stinfo['rhsrelations']).next())
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1584
        linkedvar = rel.children[0].variable
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1585
        if rel.r_type == 'eid':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1586
            return linkedvar.accept(self)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1587
        if isinstance(linkedvar, ColumnAlias):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1588
            raise BadRQLQuery('variable %s should be selected by the subquery'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1589
                              % variable.name)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1590
        try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1591
            sql = self._varmap['%s.%s' % (linkedvar.name, rel.r_type)]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1592
        except KeyError:
5013
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1593
            mapkey = '%s.%s' % (self._state.solution[linkedvar.name], rel.r_type)
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1594
            if mapkey in self.attr_map:
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1595
                cb, sourcecb = self.attr_map[mapkey]
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1596
                if not sourcecb:
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1597
                    return cb(self, linkedvar, rel)
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1598
                # attribute mapped at the source level (bfss for instance)
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1599
                stmt = rel.stmt
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1600
                for selectidx, vref in iter_mapped_var_sels(stmt, variable):
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1601
                    stack = [cb]
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1602
                    update_source_cb_stack(self._state, stmt, vref, stack)
ad91f93bbb93 [source storage] refactor source sql generation and results handling to allow repository side callbacks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5010
diff changeset
  1603
                    self._state._needs_source_cb[selectidx] = stack
1802
d628defebc17 delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 1522
diff changeset
  1604
            linkedvar.accept(self)
1251
af40e615dc89 introduce a 'cw_' prefix on entity table and column names so we don't conflict with sql or DBMS specific keywords
sylvain.thenault@logilab.fr
parents: 1124
diff changeset
  1605
            sql = '%s.%s%s' % (linkedvar._q_sqltable, SQL_PREFIX, rel.r_type)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1606
        return sql
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1607
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1608
    # tables handling #########################################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1609
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1610
    def _var_table(self, var):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1611
        var.accept(self)#.visit_variable(var)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1612
        return var._q_sqltable