author | Sylvain Thénault <sylvain.thenault@logilab.fr> |
Wed, 02 Jun 2010 16:15:05 +0200 | |
changeset 5636 | 8138d9c86ac8 |
parent 5557 | 1a534c596bff |
child 5726 | c3b99606644d |
permissions | -rw-r--r-- |
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# copyright 2003-2010 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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"""plan execution of rql queries on a single source |
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""" |
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from __future__ import with_statement |
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__docformat__ = "restructuredtext en" |
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from copy import copy |
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from rql.stmts import Union, Select |
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from rql.nodes import Constant, Relation |
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from cubicweb import QueryError, typed_eid |
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from cubicweb.schema import VIRTUAL_RTYPES |
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from cubicweb.rqlrewrite import add_types_restriction |
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from cubicweb.server.session import security_enabled |
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from cubicweb.server.hook import CleanupDeletedEidsCacheOp |
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READ_ONLY_RTYPES = set(('eid', 'has_text', 'is', 'is_instance_of', 'identity')) |
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_CONSTANT = object() |
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_FROM_SUBSTEP = object() |
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def _extract_const_attributes(plan, rqlst, to_build): |
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"""add constant values to entity def, mark variables to be selected |
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""" |
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to_select = {} |
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for relation in rqlst.main_relations: |
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lhs, rhs = relation.get_variable_parts() |
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rtype = relation.r_type |
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if rtype in READ_ONLY_RTYPES: |
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raise QueryError("can't assign to %s" % rtype) |
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try: |
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edef = to_build[str(lhs)] |
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except KeyError: |
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# lhs var is not to build, should be selected and added as an |
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# object relation |
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edef = to_build[str(rhs)] |
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to_select.setdefault(edef, []).append((rtype, lhs, 1)) |
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else: |
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if isinstance(rhs, Constant) and not rhs.uid: |
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# add constant values to entity def |
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value = rhs.eval(plan.args) |
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eschema = edef.e_schema |
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attrtype = eschema.subjrels[rtype].objects(eschema)[0] |
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if attrtype == 'Password' and isinstance(value, unicode): |
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value = value.encode('UTF8') |
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edef[rtype] = value |
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elif to_build.has_key(str(rhs)): |
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# create a relation between two newly created variables |
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plan.add_relation_def((edef, rtype, to_build[rhs.name])) |
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else: |
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to_select.setdefault(edef, []).append( (rtype, rhs, 0) ) |
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return to_select |
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def _extract_eid_consts(plan, rqlst): |
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"""return a dict mapping rqlst variable object to their eid if specified in |
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the syntax tree |
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""" |
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session = plan.session |
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if rqlst.where is None: |
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return {} |
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eidconsts = {} |
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neweids = session.transaction_data.get('neweids', ()) |
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checkread = session.read_security |
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eschema = session.vreg.schema.eschema |
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for rel in rqlst.where.get_nodes(Relation): |
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if rel.r_type == 'eid' and not rel.neged(strict=True): |
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lhs, rhs = rel.get_variable_parts() |
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if isinstance(rhs, Constant): |
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eid = typed_eid(rhs.eval(plan.args)) |
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# check read permission here since it may not be done by |
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# the generated select substep if not emited (eg nothing |
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# to be selected) |
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92 |
if checkread and eid not in neweids: |
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93 |
with security_enabled(session, read=False): |
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94 |
eschema(session.describe(eid)[0]).check_perm( |
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|
95 |
session, 'read', eid=eid) |
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|
96 |
eidconsts[lhs.variable] = eid |
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|
97 |
return eidconsts |
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|
98 |
|
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|
99 |
def _build_substep_query(select, origrqlst): |
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100 |
"""Finalize substep select query that should be executed to get proper |
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|
101 |
selection of stuff to insert/update. |
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102 |
|
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|
103 |
Return None when no query actually needed, else the given select node that |
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|
104 |
will be used as substep query. |
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105 |
|
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|
106 |
When select has nothing selected, search in origrqlst for restriction that |
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|
107 |
should be considered. |
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108 |
""" |
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|
109 |
if select.selection: |
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|
110 |
if origrqlst.where is not None: |
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|
111 |
select.set_where(origrqlst.where.copy(select)) |
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112 |
return select |
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|
113 |
if origrqlst.where is None: |
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|
114 |
return |
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115 |
for rel in origrqlst.where.iget_nodes(Relation): |
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|
116 |
# search for a relation which is neither a type restriction (is) nor an |
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|
117 |
# eid specification (not neged eid with constant node |
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118 |
if rel.neged(strict=True) or not ( |
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|
119 |
rel.is_types_restriction() or |
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120 |
(rel.r_type == 'eid' |
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121 |
and isinstance(rel.get_variable_parts()[1], Constant))): |
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|
122 |
break |
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123 |
else: |
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124 |
return |
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125 |
select.set_where(origrqlst.where.copy(select)) |
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126 |
if not select.selection: |
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127 |
# no selection, append one randomly |
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128 |
select.append_selected(rel.children[0].copy(select)) |
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|
129 |
return select |
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|
130 |
|
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|
131 |
|
0 | 132 |
class SSPlanner(object): |
133 |
"""SingleSourcePlanner: build execution plan for rql queries |
|
134 |
||
135 |
optimized for single source repositories |
|
136 |
""" |
|
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|
137 |
|
0 | 138 |
def __init__(self, schema, rqlhelper): |
139 |
self.schema = schema |
|
140 |
self.rqlhelper = rqlhelper |
|
141 |
||
142 |
def build_plan(self, plan): |
|
143 |
"""build an execution plan from a RQL query |
|
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|
144 |
|
0 | 145 |
do nothing here, dispatch according to the statement type |
146 |
""" |
|
147 |
build_plan = getattr(self, 'build_%s_plan' % plan.rqlst.TYPE) |
|
148 |
for step in build_plan(plan, plan.rqlst): |
|
149 |
plan.add_step(step) |
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|
150 |
|
0 | 151 |
def build_select_plan(self, plan, rqlst): |
152 |
"""build execution plan for a SELECT RQL query. Suppose only one source |
|
153 |
is available and so avoid work need for query decomposition among sources |
|
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|
154 |
|
0 | 155 |
the rqlst should not be tagged at this point. |
156 |
""" |
|
157 |
plan.preprocess(rqlst) |
|
158 |
return (OneFetchStep(plan, rqlst, plan.session.repo.sources),) |
|
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|
159 |
|
0 | 160 |
def build_insert_plan(self, plan, rqlst): |
161 |
"""get an execution plan from an INSERT RQL query""" |
|
162 |
# each variable in main variables is a new entity to insert |
|
163 |
to_build = {} |
|
164 |
session = plan.session |
|
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|
165 |
etype_class = session.vreg['etypes'].etype_class |
0 | 166 |
for etype, var in rqlst.main_variables: |
167 |
# need to do this since entity class is shared w. web client code ! |
|
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|
168 |
to_build[var.name] = etype_class(etype)(session) |
0 | 169 |
plan.add_entity_def(to_build[var.name]) |
170 |
# add constant values to entity def, mark variables to be selected |
|
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|
171 |
to_select = _extract_const_attributes(plan, rqlst, to_build) |
0 | 172 |
# add necessary steps to add relations and update attributes |
173 |
step = InsertStep(plan) # insert each entity and its relations |
|
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|
174 |
step.children += self._compute_relation_steps(plan, rqlst, to_select) |
0 | 175 |
return (step,) |
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|
176 |
|
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|
177 |
def _compute_relation_steps(self, plan, rqlst, to_select): |
0 | 178 |
"""handle the selection of relations for an insert query""" |
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|
179 |
eidconsts = _extract_eid_consts(plan, rqlst) |
0 | 180 |
for edef, rdefs in to_select.items(): |
181 |
# create a select rql st to fetch needed data |
|
182 |
select = Select() |
|
183 |
eschema = edef.e_schema |
|
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|
184 |
for i, (rtype, term, reverse) in enumerate(rdefs): |
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185 |
if getattr(term, 'variable', None) in eidconsts: |
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186 |
value = eidconsts[term.variable] |
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187 |
else: |
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|
188 |
select.append_selected(term.copy(select)) |
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|
189 |
value = _FROM_SUBSTEP |
0 | 190 |
if reverse: |
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191 |
rdefs[i] = (rtype, InsertRelationsStep.REVERSE_RELATION, value) |
0 | 192 |
else: |
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|
193 |
rschema = eschema.subjrels[rtype] |
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|
194 |
if rschema.final or rschema.inlined: |
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195 |
rdefs[i] = (rtype, InsertRelationsStep.FINAL, value) |
0 | 196 |
else: |
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197 |
rdefs[i] = (rtype, InsertRelationsStep.RELATION, value) |
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|
198 |
step = InsertRelationsStep(plan, edef, rdefs) |
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|
199 |
select = _build_substep_query(select, rqlst) |
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200 |
if select is not None: |
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|
201 |
step.children += self._select_plan(plan, select, rqlst.solutions) |
0 | 202 |
yield step |
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|
0 | 204 |
def build_delete_plan(self, plan, rqlst): |
205 |
"""get an execution plan from a DELETE RQL query""" |
|
206 |
# build a select query to fetch entities to delete |
|
207 |
steps = [] |
|
208 |
for etype, var in rqlst.main_variables: |
|
209 |
step = DeleteEntitiesStep(plan) |
|
210 |
step.children += self._sel_variable_step(plan, rqlst.solutions, |
|
211 |
rqlst.where, etype, var) |
|
212 |
steps.append(step) |
|
213 |
for relation in rqlst.main_relations: |
|
214 |
step = DeleteRelationsStep(plan, relation.r_type) |
|
215 |
step.children += self._sel_relation_steps(plan, rqlst.solutions, |
|
216 |
rqlst.where, relation) |
|
217 |
steps.append(step) |
|
218 |
return steps |
|
219 |
||
220 |
def _sel_variable_step(self, plan, solutions, restriction, etype, varref): |
|
221 |
"""handle the selection of variables for a delete query""" |
|
222 |
select = Select() |
|
223 |
varref = varref.copy(select) |
|
224 |
select.defined_vars = {varref.name: varref.variable} |
|
225 |
select.append_selected(varref) |
|
226 |
if restriction is not None: |
|
227 |
select.set_where(restriction.copy(select)) |
|
228 |
if etype != 'Any': |
|
229 |
select.add_type_restriction(varref.variable, etype) |
|
230 |
return self._select_plan(plan, select, solutions) |
|
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|
0 | 232 |
def _sel_relation_steps(self, plan, solutions, restriction, relation): |
233 |
"""handle the selection of relations for a delete query""" |
|
234 |
select = Select() |
|
235 |
lhs, rhs = relation.get_variable_parts() |
|
236 |
select.append_selected(lhs.copy(select)) |
|
237 |
select.append_selected(rhs.copy(select)) |
|
238 |
select.set_where(relation.copy(select)) |
|
239 |
if restriction is not None: |
|
240 |
select.add_restriction(restriction.copy(select)) |
|
241 |
return self._select_plan(plan, select, solutions) |
|
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|
0 | 243 |
def build_set_plan(self, plan, rqlst): |
244 |
"""get an execution plan from an SET RQL query""" |
|
245 |
getrschema = self.schema.rschema |
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select = Select() # potential substep query |
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selectedidx = {} # local state |
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attributes = set() # edited attributes |
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updatedefs = [] # definition of update attributes/relations |
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250 |
selidx = residx = 0 # substep selection / resulting rset indexes |
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# search for eid const in the WHERE clause |
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252 |
eidconsts = _extract_eid_consts(plan, rqlst) |
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253 |
# build `updatedefs` describing things to update and add necessary |
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254 |
# variables to the substep selection |
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|
255 |
for i, relation in enumerate(rqlst.main_relations): |
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|
256 |
if relation.r_type in VIRTUAL_RTYPES: |
0 | 257 |
raise QueryError('can not assign to %r relation' |
258 |
% relation.r_type) |
|
259 |
lhs, rhs = relation.get_variable_parts() |
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260 |
lhskey = lhs.as_string('utf-8') |
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261 |
if not lhskey in selectedidx: |
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|
262 |
if lhs.variable in eidconsts: |
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263 |
eid = eidconsts[lhs.variable] |
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264 |
lhsinfo = (_CONSTANT, eid, residx) |
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|
265 |
else: |
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|
266 |
select.append_selected(lhs.copy(select)) |
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|
267 |
lhsinfo = (_FROM_SUBSTEP, selidx, residx) |
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|
268 |
selidx += 1 |
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269 |
residx += 1 |
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270 |
selectedidx[lhskey] = lhsinfo |
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271 |
else: |
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|
272 |
lhsinfo = selectedidx[lhskey][:-1] + (None,) |
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273 |
rhskey = rhs.as_string('utf-8') |
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274 |
if not rhskey in selectedidx: |
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|
275 |
if isinstance(rhs, Constant): |
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|
276 |
rhsinfo = (_CONSTANT, rhs.eval(plan.args), residx) |
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|
277 |
elif getattr(rhs, 'variable', None) in eidconsts: |
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|
278 |
eid = eidconsts[rhs.variable] |
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|
279 |
rhsinfo = (_CONSTANT, eid, residx) |
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|
280 |
else: |
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|
281 |
select.append_selected(rhs.copy(select)) |
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|
282 |
rhsinfo = (_FROM_SUBSTEP, selidx, residx) |
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|
283 |
selidx += 1 |
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|
284 |
residx += 1 |
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|
285 |
selectedidx[rhskey] = rhsinfo |
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|
286 |
else: |
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|
287 |
rhsinfo = selectedidx[rhskey][:-1] + (None,) |
0 | 288 |
rschema = getrschema(relation.r_type) |
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|
289 |
updatedefs.append( (lhsinfo, rhsinfo, rschema) ) |
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|
290 |
if rschema.final or rschema.inlined: |
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|
291 |
attributes.add(relation.r_type) |
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|
292 |
# the update step |
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|
293 |
step = UpdateStep(plan, updatedefs, attributes) |
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|
294 |
# when necessary add substep to fetch yet unknown values |
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|
295 |
select = _build_substep_query(select, rqlst) |
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|
296 |
if select is not None: |
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|
297 |
# set distinct to avoid potential duplicate key error |
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|
298 |
select.distinct = True |
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|
299 |
step.children += self._select_plan(plan, select, rqlst.solutions) |
0 | 300 |
return (step,) |
301 |
||
302 |
# internal methods ######################################################## |
|
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|
303 |
|
0 | 304 |
def _select_plan(self, plan, select, solutions): |
305 |
union = Union() |
|
306 |
union.append(select) |
|
307 |
select.clean_solutions(solutions) |
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|
308 |
add_types_restriction(self.schema, select) |
0 | 309 |
self.rqlhelper.annotate(union) |
310 |
return self.build_select_plan(plan, union) |
|
311 |
||
312 |
||
313 |
# execution steps and helper functions ######################################## |
|
314 |
||
315 |
def varmap_test_repr(varmap, tablesinorder): |
|
316 |
if varmap is None: |
|
317 |
return varmap |
|
318 |
maprepr = {} |
|
319 |
for var, sql in varmap.iteritems(): |
|
320 |
table, col = sql.split('.') |
|
321 |
maprepr[var] = '%s.%s' % (tablesinorder[table], col) |
|
322 |
return maprepr |
|
323 |
||
324 |
def offset_result(offset, result): |
|
325 |
offset -= len(result) |
|
326 |
if offset < 0: |
|
327 |
result = result[offset:] |
|
328 |
offset = None |
|
329 |
elif offset == 0: |
|
330 |
offset = None |
|
331 |
result = () |
|
332 |
return offset, result |
|
333 |
||
334 |
||
335 |
class LimitOffsetMixIn(object): |
|
336 |
limit = offset = None |
|
337 |
def set_limit_offset(self, limit, offset): |
|
338 |
self.limit = limit |
|
339 |
self.offset = offset or None |
|
340 |
||
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|
341 |
|
0 | 342 |
class Step(object): |
343 |
"""base abstract class for execution step""" |
|
344 |
def __init__(self, plan): |
|
345 |
self.plan = plan |
|
346 |
self.children = [] |
|
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|
347 |
|
0 | 348 |
def execute_child(self): |
349 |
assert len(self.children) == 1 |
|
350 |
return self.children[0].execute() |
|
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|
351 |
|
0 | 352 |
def execute_children(self): |
353 |
for step in self.children: |
|
354 |
step.execute() |
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|
355 |
|
0 | 356 |
def execute(self): |
357 |
"""execute this step and store partial (eg this step) results""" |
|
358 |
raise NotImplementedError() |
|
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|
359 |
|
0 | 360 |
def mytest_repr(self): |
361 |
"""return a representation of this step suitable for test""" |
|
362 |
return (self.__class__.__name__,) |
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|
363 |
|
0 | 364 |
def test_repr(self): |
365 |
"""return a representation of this step suitable for test""" |
|
366 |
return self.mytest_repr() + ( |
|
367 |
[step.test_repr() for step in self.children],) |
|
368 |
||
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|
369 |
|
0 | 370 |
class OneFetchStep(LimitOffsetMixIn, Step): |
371 |
"""step consisting in fetching data from sources and directly returning |
|
372 |
results |
|
373 |
""" |
|
374 |
def __init__(self, plan, union, sources, inputmap=None): |
|
375 |
Step.__init__(self, plan) |
|
376 |
self.union = union |
|
377 |
self.sources = sources |
|
378 |
self.inputmap = inputmap |
|
379 |
self.set_limit_offset(union.children[-1].limit, union.children[-1].offset) |
|
380 |
||
381 |
def set_limit_offset(self, limit, offset): |
|
382 |
LimitOffsetMixIn.set_limit_offset(self, limit, offset) |
|
383 |
for select in self.union.children: |
|
384 |
select.limit = limit |
|
385 |
select.offset = offset |
|
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delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
386 |
|
0 | 387 |
def execute(self): |
388 |
"""call .syntax_tree_search with the given syntax tree on each |
|
389 |
source for each solution |
|
390 |
""" |
|
391 |
self.execute_children() |
|
392 |
session = self.plan.session |
|
393 |
args = self.plan.args |
|
394 |
inputmap = self.inputmap |
|
395 |
union = self.union |
|
396 |
# do we have to use a inputmap from a previous step ? If so disable |
|
397 |
# cachekey |
|
398 |
if inputmap or self.plan.cache_key is None: |
|
399 |
cachekey = None |
|
400 |
# union may have been splited into subqueries, rebuild a cache key |
|
401 |
elif isinstance(self.plan.cache_key, tuple): |
|
402 |
cachekey = list(self.plan.cache_key) |
|
403 |
cachekey[0] = union.as_string() |
|
404 |
cachekey = tuple(cachekey) |
|
405 |
else: |
|
406 |
cachekey = union.as_string() |
|
407 |
result = [] |
|
408 |
# limit / offset processing |
|
409 |
limit = self.limit |
|
410 |
offset = self.offset |
|
411 |
if offset is not None: |
|
412 |
if len(self.sources) > 1: |
|
413 |
# we'll have to deal with limit/offset by ourself |
|
414 |
if union.children[-1].limit: |
|
415 |
union.children[-1].limit = limit + offset |
|
416 |
union.children[-1].offset = None |
|
417 |
else: |
|
418 |
offset, limit = None, None |
|
419 |
for source in self.sources: |
|
420 |
if offset is None and limit is not None: |
|
421 |
# modifying the sample rqlst is enough since sql generation |
|
422 |
# will pick it here as well |
|
423 |
union.children[-1].limit = limit - len(result) |
|
424 |
result_ = source.syntax_tree_search(session, union, args, cachekey, |
|
425 |
inputmap) |
|
426 |
if offset is not None: |
|
427 |
offset, result_ = offset_result(offset, result_) |
|
428 |
result += result_ |
|
429 |
if limit is not None: |
|
430 |
if len(result) >= limit: |
|
431 |
return result[:limit] |
|
432 |
#print 'ONEFETCH RESULT %s' % (result) |
|
433 |
return result |
|
434 |
||
435 |
def mytest_repr(self): |
|
436 |
"""return a representation of this step suitable for test""" |
|
437 |
try: |
|
438 |
inputmap = varmap_test_repr(self.inputmap, self.plan.tablesinorder) |
|
439 |
except AttributeError: |
|
440 |
inputmap = self.inputmap |
|
441 |
return (self.__class__.__name__, |
|
442 |
sorted((r.as_string(kwargs=self.plan.args), r.solutions) |
|
443 |
for r in self.union.children), |
|
444 |
self.limit, self.offset, |
|
445 |
sorted(self.sources), inputmap) |
|
446 |
||
447 |
||
448 |
# UPDATE/INSERT/DELETE steps ################################################## |
|
449 |
||
4764
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
450 |
class InsertRelationsStep(Step): |
0 | 451 |
"""step consisting in adding attributes/relations to entity defs from a |
452 |
previous FetchStep |
|
453 |
||
454 |
relations values comes from the latest result, with one columns for |
|
2921
8e2544e78a5e
test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
455 |
each relation defined in self.rdefs |
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
456 |
|
0 | 457 |
for one entity definition, we'll construct N entity, where N is the |
458 |
number of the latest result |
|
459 |
""" |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
460 |
|
0 | 461 |
FINAL = 0 |
462 |
RELATION = 1 |
|
463 |
REVERSE_RELATION = 2 |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
464 |
|
2921
8e2544e78a5e
test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
465 |
def __init__(self, plan, edef, rdefs): |
0 | 466 |
Step.__init__(self, plan) |
467 |
# partial entity definition to expand |
|
2921
8e2544e78a5e
test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
468 |
self.edef = edef |
0 | 469 |
# definition of relations to complete |
2921
8e2544e78a5e
test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
470 |
self.rdefs = rdefs |
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
471 |
|
0 | 472 |
def execute(self): |
473 |
"""execute this step""" |
|
2921
8e2544e78a5e
test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
474 |
base_edef = self.edef |
8e2544e78a5e
test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
475 |
edefs = [] |
4764
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
476 |
if self.children: |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
477 |
result = self.execute_child() |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
478 |
else: |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
479 |
result = [[]] |
2921
8e2544e78a5e
test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
480 |
for row in result: |
0 | 481 |
# get a new entity definition for this row |
2921
8e2544e78a5e
test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
482 |
edef = copy(base_edef) |
0 | 483 |
# complete this entity def using row values |
4764
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
484 |
index = 0 |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
485 |
for rtype, rorder, value in self.rdefs: |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
486 |
if value is _FROM_SUBSTEP: |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
487 |
value = row[index] |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
488 |
index += 1 |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
489 |
if rorder == InsertRelationsStep.FINAL: |
5557
1a534c596bff
[entity] continue cleanup of Entity/AnyEntity namespace
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
5424
diff
changeset
|
490 |
edef._cw_rql_set_value(rtype, value) |
4764
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
491 |
elif rorder == InsertRelationsStep.RELATION: |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
492 |
self.plan.add_relation_def( (edef, rtype, value) ) |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
493 |
edef.querier_pending_relations[(rtype, 'subject')] = value |
0 | 494 |
else: |
4764
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
495 |
self.plan.add_relation_def( (value, rtype, edef) ) |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
496 |
edef.querier_pending_relations[(rtype, 'object')] = value |
2921
8e2544e78a5e
test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
497 |
edefs.append(edef) |
8e2544e78a5e
test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
498 |
self.plan.substitute_entity_def(base_edef, edefs) |
8e2544e78a5e
test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
499 |
return result |
0 | 500 |
|
501 |
class InsertStep(Step): |
|
502 |
"""step consisting in inserting new entities / relations""" |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
503 |
|
0 | 504 |
def execute(self): |
505 |
"""execute this step""" |
|
506 |
for step in self.children: |
|
4764
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
507 |
assert isinstance(step, InsertRelationsStep) |
0 | 508 |
step.plan = self.plan |
509 |
step.execute() |
|
510 |
# insert entities first |
|
511 |
result = self.plan.insert_entity_defs() |
|
512 |
# then relation |
|
513 |
self.plan.insert_relation_defs() |
|
514 |
# return eids of inserted entities |
|
515 |
return result |
|
516 |
||
517 |
||
518 |
class DeleteEntitiesStep(Step): |
|
519 |
"""step consisting in deleting entities""" |
|
520 |
||
521 |
def execute(self): |
|
522 |
"""execute this step""" |
|
3648
665c37544060
on entity deletion query, return eids of deleted entities
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
3437
diff
changeset
|
523 |
results = self.execute_child() |
5058
6dfeb8e75188
[repo] don't execute child step twice in EntitiesDeleteStep
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4970
diff
changeset
|
524 |
todelete = frozenset(typed_eid(eid) for eid, in results) |
0 | 525 |
session = self.plan.session |
526 |
delete = session.repo.glob_delete_entity |
|
5067
adc2122eed03
[repo] more efficient eid cache operations handling based on set_operation; refactor
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
5058
diff
changeset
|
527 |
# mark eids as being deleted in session info and setup cache update |
adc2122eed03
[repo] more efficient eid cache operations handling based on set_operation; refactor
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
5058
diff
changeset
|
528 |
# operation (register pending eids before actual deletion to avoid |
adc2122eed03
[repo] more efficient eid cache operations handling based on set_operation; refactor
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
5058
diff
changeset
|
529 |
# multiple call to glob_delete_entity) |
adc2122eed03
[repo] more efficient eid cache operations handling based on set_operation; refactor
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
5058
diff
changeset
|
530 |
try: |
adc2122eed03
[repo] more efficient eid cache operations handling based on set_operation; refactor
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
5058
diff
changeset
|
531 |
pending = session.transaction_data['pendingeids'] |
adc2122eed03
[repo] more efficient eid cache operations handling based on set_operation; refactor
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
5058
diff
changeset
|
532 |
except KeyError: |
adc2122eed03
[repo] more efficient eid cache operations handling based on set_operation; refactor
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
5058
diff
changeset
|
533 |
pending = session.transaction_data['pendingeids'] = set() |
adc2122eed03
[repo] more efficient eid cache operations handling based on set_operation; refactor
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
5058
diff
changeset
|
534 |
CleanupDeletedEidsCacheOp(session) |
0 | 535 |
actual = todelete - pending |
536 |
pending |= actual |
|
537 |
for eid in actual: |
|
538 |
delete(session, eid) |
|
3648
665c37544060
on entity deletion query, return eids of deleted entities
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
3437
diff
changeset
|
539 |
return results |
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
540 |
|
0 | 541 |
class DeleteRelationsStep(Step): |
542 |
"""step consisting in deleting relations""" |
|
543 |
||
544 |
def __init__(self, plan, rtype): |
|
545 |
Step.__init__(self, plan) |
|
546 |
self.rtype = rtype |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
547 |
|
0 | 548 |
def execute(self): |
549 |
"""execute this step""" |
|
550 |
session = self.plan.session |
|
551 |
delete = session.repo.glob_delete_relation |
|
552 |
for subj, obj in self.execute_child(): |
|
553 |
delete(session, subj, self.rtype, obj) |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
554 |
|
0 | 555 |
|
556 |
class UpdateStep(Step): |
|
557 |
"""step consisting in updating entities / adding relations from relations |
|
558 |
definitions and from results fetched in previous step |
|
559 |
""" |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
560 |
|
4764
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
561 |
def __init__(self, plan, updatedefs, attributes): |
0 | 562 |
Step.__init__(self, plan) |
4764
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
563 |
self.updatedefs = updatedefs |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
564 |
self.attributes = attributes |
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
565 |
|
0 | 566 |
def execute(self): |
567 |
"""execute this step""" |
|
568 |
session = self.plan.session |
|
569 |
repo = session.repo |
|
570 |
edefs = {} |
|
571 |
# insert relations |
|
4764
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
572 |
if self.children: |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
573 |
result = self.execute_child() |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
574 |
else: |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
575 |
result = [[]] |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
576 |
for i, row in enumerate(result): |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
577 |
newrow = [] |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
578 |
for (lhsinfo, rhsinfo, rschema) in self.updatedefs: |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
579 |
lhsval = _handle_relterm(lhsinfo, row, newrow) |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
580 |
rhsval = _handle_relterm(rhsinfo, row, newrow) |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
581 |
if rschema.final or rschema.inlined: |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
582 |
eid = typed_eid(lhsval) |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
583 |
try: |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
584 |
edef = edefs[eid] |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
585 |
except KeyError: |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
586 |
edefs[eid] = edef = session.entity_from_eid(eid) |
5557
1a534c596bff
[entity] continue cleanup of Entity/AnyEntity namespace
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
5424
diff
changeset
|
587 |
edef._cw_rql_set_value(str(rschema), rhsval) |
0 | 588 |
else: |
4764
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
589 |
repo.glob_add_relation(session, lhsval, str(rschema), rhsval) |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
590 |
result[i] = newrow |
0 | 591 |
# update entities |
592 |
for eid, edef in edefs.iteritems(): |
|
5213
8604000bf3b2
[repository] fix edited_attributes management in multiple SET queries
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
5067
diff
changeset
|
593 |
repo.glob_update_entity(session, edef, set(self.attributes)) |
0 | 594 |
return result |
4764
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
595 |
|
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
596 |
def _handle_relterm(info, row, newrow): |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
597 |
if info[0] is _CONSTANT: |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
598 |
val = info[1] |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
599 |
else: # _FROM_SUBSTEP |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
600 |
val = row[info[1]] |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
601 |
if info[-1] is not None: |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
602 |
newrow.append(val) |
ec9c20c6b9f7
[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4252
diff
changeset
|
603 |
return val |