author | Stephanie Marcu <stephanie.marcu@logilab.fr> |
Fri, 16 Apr 2010 16:43:41 +0200 | |
branch | stable |
changeset 5313 | c4fe397379c7 |
parent 5213 | 8604000bf3b2 |
child 5421 | 8167de96c523 |
permissions | -rw-r--r-- |
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"""plan execution of rql queries on a single source |
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:organization: Logilab |
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update copyright: welcome 2010
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:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2. |
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr |
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses |
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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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if checkread and eid not in neweids: |
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with security_enabled(session, read=False): |
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eschema(session.describe(eid)[0]).check_perm( |
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session, 'read', eid=eid) |
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eidconsts[lhs.variable] = eid |
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return eidconsts |
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def _build_substep_query(select, origrqlst): |
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"""Finalize substep select query that should be executed to get proper |
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selection of stuff to insert/update. |
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90 |
Return None when no query actually needed, else the given select node that |
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91 |
will be used as substep query. |
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92 |
|
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|
93 |
When select has nothing selected, search in origrqlst for restriction that |
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94 |
should be considered. |
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95 |
""" |
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96 |
if select.selection: |
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97 |
if origrqlst.where is not None: |
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98 |
select.set_where(origrqlst.where.copy(select)) |
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99 |
return select |
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100 |
if origrqlst.where is None: |
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101 |
return |
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102 |
for rel in origrqlst.where.iget_nodes(Relation): |
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103 |
# search for a relation which is neither a type restriction (is) nor an |
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104 |
# eid specification (not neged eid with constant node |
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105 |
if rel.neged(strict=True) or not ( |
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106 |
rel.is_types_restriction() or |
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107 |
(rel.r_type == 'eid' |
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108 |
and isinstance(rel.get_variable_parts()[1], Constant))): |
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109 |
break |
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110 |
else: |
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111 |
return |
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112 |
select.set_where(origrqlst.where.copy(select)) |
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113 |
if not select.selection: |
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114 |
# no selection, append one randomly |
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115 |
select.append_selected(rel.children[0].copy(select)) |
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116 |
return select |
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117 |
|
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118 |
|
0 | 119 |
class SSPlanner(object): |
120 |
"""SingleSourcePlanner: build execution plan for rql queries |
|
121 |
||
122 |
optimized for single source repositories |
|
123 |
""" |
|
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124 |
|
0 | 125 |
def __init__(self, schema, rqlhelper): |
126 |
self.schema = schema |
|
127 |
self.rqlhelper = rqlhelper |
|
128 |
||
129 |
def build_plan(self, plan): |
|
130 |
"""build an execution plan from a RQL query |
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131 |
|
0 | 132 |
do nothing here, dispatch according to the statement type |
133 |
""" |
|
134 |
build_plan = getattr(self, 'build_%s_plan' % plan.rqlst.TYPE) |
|
135 |
for step in build_plan(plan, plan.rqlst): |
|
136 |
plan.add_step(step) |
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137 |
|
0 | 138 |
def build_select_plan(self, plan, rqlst): |
139 |
"""build execution plan for a SELECT RQL query. Suppose only one source |
|
140 |
is available and so avoid work need for query decomposition among sources |
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141 |
|
0 | 142 |
the rqlst should not be tagged at this point. |
143 |
""" |
|
144 |
plan.preprocess(rqlst) |
|
145 |
return (OneFetchStep(plan, rqlst, plan.session.repo.sources),) |
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146 |
|
0 | 147 |
def build_insert_plan(self, plan, rqlst): |
148 |
"""get an execution plan from an INSERT RQL query""" |
|
149 |
# each variable in main variables is a new entity to insert |
|
150 |
to_build = {} |
|
151 |
session = plan.session |
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etype_class = session.vreg['etypes'].etype_class |
0 | 153 |
for etype, var in rqlst.main_variables: |
154 |
# need to do this since entity class is shared w. web client code ! |
|
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155 |
to_build[var.name] = etype_class(etype)(session) |
0 | 156 |
plan.add_entity_def(to_build[var.name]) |
157 |
# add constant values to entity def, mark variables to be selected |
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158 |
to_select = _extract_const_attributes(plan, rqlst, to_build) |
0 | 159 |
# add necessary steps to add relations and update attributes |
160 |
step = InsertStep(plan) # insert each entity and its relations |
|
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161 |
step.children += self._compute_relation_steps(plan, rqlst, to_select) |
0 | 162 |
return (step,) |
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163 |
|
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164 |
def _compute_relation_steps(self, plan, rqlst, to_select): |
0 | 165 |
"""handle the selection of relations for an insert query""" |
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166 |
eidconsts = _extract_eid_consts(plan, rqlst) |
0 | 167 |
for edef, rdefs in to_select.items(): |
168 |
# create a select rql st to fetch needed data |
|
169 |
select = Select() |
|
170 |
eschema = edef.e_schema |
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171 |
for i, (rtype, term, reverse) in enumerate(rdefs): |
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172 |
if getattr(term, 'variable', None) in eidconsts: |
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173 |
value = eidconsts[term.variable] |
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174 |
else: |
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175 |
select.append_selected(term.copy(select)) |
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176 |
value = _FROM_SUBSTEP |
0 | 177 |
if reverse: |
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178 |
rdefs[i] = (rtype, InsertRelationsStep.REVERSE_RELATION, value) |
0 | 179 |
else: |
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180 |
rschema = eschema.subjrels[rtype] |
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181 |
if rschema.final or rschema.inlined: |
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rdefs[i] = (rtype, InsertRelationsStep.FINAL, value) |
0 | 183 |
else: |
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184 |
rdefs[i] = (rtype, InsertRelationsStep.RELATION, value) |
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185 |
step = InsertRelationsStep(plan, edef, rdefs) |
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186 |
select = _build_substep_query(select, rqlst) |
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187 |
if select is not None: |
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188 |
step.children += self._select_plan(plan, select, rqlst.solutions) |
0 | 189 |
yield step |
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190 |
|
0 | 191 |
def build_delete_plan(self, plan, rqlst): |
192 |
"""get an execution plan from a DELETE RQL query""" |
|
193 |
# build a select query to fetch entities to delete |
|
194 |
steps = [] |
|
195 |
for etype, var in rqlst.main_variables: |
|
196 |
step = DeleteEntitiesStep(plan) |
|
197 |
step.children += self._sel_variable_step(plan, rqlst.solutions, |
|
198 |
rqlst.where, etype, var) |
|
199 |
steps.append(step) |
|
200 |
for relation in rqlst.main_relations: |
|
201 |
step = DeleteRelationsStep(plan, relation.r_type) |
|
202 |
step.children += self._sel_relation_steps(plan, rqlst.solutions, |
|
203 |
rqlst.where, relation) |
|
204 |
steps.append(step) |
|
205 |
return steps |
|
206 |
||
207 |
def _sel_variable_step(self, plan, solutions, restriction, etype, varref): |
|
208 |
"""handle the selection of variables for a delete query""" |
|
209 |
select = Select() |
|
210 |
varref = varref.copy(select) |
|
211 |
select.defined_vars = {varref.name: varref.variable} |
|
212 |
select.append_selected(varref) |
|
213 |
if restriction is not None: |
|
214 |
select.set_where(restriction.copy(select)) |
|
215 |
if etype != 'Any': |
|
216 |
select.add_type_restriction(varref.variable, etype) |
|
217 |
return self._select_plan(plan, select, solutions) |
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218 |
|
0 | 219 |
def _sel_relation_steps(self, plan, solutions, restriction, relation): |
220 |
"""handle the selection of relations for a delete query""" |
|
221 |
select = Select() |
|
222 |
lhs, rhs = relation.get_variable_parts() |
|
223 |
select.append_selected(lhs.copy(select)) |
|
224 |
select.append_selected(rhs.copy(select)) |
|
225 |
select.set_where(relation.copy(select)) |
|
226 |
if restriction is not None: |
|
227 |
select.add_restriction(restriction.copy(select)) |
|
228 |
return self._select_plan(plan, select, solutions) |
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229 |
|
0 | 230 |
def build_set_plan(self, plan, rqlst): |
231 |
"""get an execution plan from an SET RQL query""" |
|
232 |
getrschema = self.schema.rschema |
|
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233 |
select = Select() # potential substep query |
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234 |
selectedidx = {} # local state |
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235 |
attributes = set() # edited attributes |
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236 |
updatedefs = [] # definition of update attributes/relations |
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237 |
selidx = residx = 0 # substep selection / resulting rset indexes |
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# search for eid const in the WHERE clause |
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239 |
eidconsts = _extract_eid_consts(plan, rqlst) |
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240 |
# build `updatedefs` describing things to update and add necessary |
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241 |
# variables to the substep selection |
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|
242 |
for i, relation in enumerate(rqlst.main_relations): |
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|
243 |
if relation.r_type in VIRTUAL_RTYPES: |
0 | 244 |
raise QueryError('can not assign to %r relation' |
245 |
% relation.r_type) |
|
246 |
lhs, rhs = relation.get_variable_parts() |
|
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247 |
lhskey = lhs.as_string('utf-8') |
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248 |
if not lhskey in selectedidx: |
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249 |
if lhs.variable in eidconsts: |
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250 |
eid = eidconsts[lhs.variable] |
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251 |
lhsinfo = (_CONSTANT, eid, residx) |
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252 |
else: |
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253 |
select.append_selected(lhs.copy(select)) |
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254 |
lhsinfo = (_FROM_SUBSTEP, selidx, residx) |
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255 |
selidx += 1 |
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256 |
residx += 1 |
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257 |
selectedidx[lhskey] = lhsinfo |
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258 |
else: |
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|
259 |
lhsinfo = selectedidx[lhskey][:-1] + (None,) |
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260 |
rhskey = rhs.as_string('utf-8') |
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|
261 |
if not rhskey in selectedidx: |
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|
262 |
if isinstance(rhs, Constant): |
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|
263 |
rhsinfo = (_CONSTANT, rhs.eval(plan.args), residx) |
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|
264 |
elif getattr(rhs, 'variable', None) in eidconsts: |
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265 |
eid = eidconsts[rhs.variable] |
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266 |
rhsinfo = (_CONSTANT, eid, residx) |
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|
267 |
else: |
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|
268 |
select.append_selected(rhs.copy(select)) |
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|
269 |
rhsinfo = (_FROM_SUBSTEP, selidx, residx) |
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|
270 |
selidx += 1 |
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271 |
residx += 1 |
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272 |
selectedidx[rhskey] = rhsinfo |
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273 |
else: |
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|
274 |
rhsinfo = selectedidx[rhskey][:-1] + (None,) |
0 | 275 |
rschema = getrschema(relation.r_type) |
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|
276 |
updatedefs.append( (lhsinfo, rhsinfo, rschema) ) |
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follow yams 0.25 api changes to improve performance
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|
277 |
if rschema.final or rschema.inlined: |
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|
278 |
attributes.add(relation.r_type) |
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|
279 |
# the update step |
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280 |
step = UpdateStep(plan, updatedefs, attributes) |
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281 |
# when necessary add substep to fetch yet unknown values |
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282 |
select = _build_substep_query(select, rqlst) |
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283 |
if select is not None: |
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284 |
# set distinct to avoid potential duplicate key error |
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|
285 |
select.distinct = True |
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|
286 |
step.children += self._select_plan(plan, select, rqlst.solutions) |
0 | 287 |
return (step,) |
288 |
||
289 |
# internal methods ######################################################## |
|
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|
290 |
|
0 | 291 |
def _select_plan(self, plan, select, solutions): |
292 |
union = Union() |
|
293 |
union.append(select) |
|
294 |
select.clean_solutions(solutions) |
|
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|
295 |
add_types_restriction(self.schema, select) |
0 | 296 |
self.rqlhelper.annotate(union) |
297 |
return self.build_select_plan(plan, union) |
|
298 |
||
299 |
||
300 |
# execution steps and helper functions ######################################## |
|
301 |
||
302 |
def varmap_test_repr(varmap, tablesinorder): |
|
303 |
if varmap is None: |
|
304 |
return varmap |
|
305 |
maprepr = {} |
|
306 |
for var, sql in varmap.iteritems(): |
|
307 |
table, col = sql.split('.') |
|
308 |
maprepr[var] = '%s.%s' % (tablesinorder[table], col) |
|
309 |
return maprepr |
|
310 |
||
311 |
def offset_result(offset, result): |
|
312 |
offset -= len(result) |
|
313 |
if offset < 0: |
|
314 |
result = result[offset:] |
|
315 |
offset = None |
|
316 |
elif offset == 0: |
|
317 |
offset = None |
|
318 |
result = () |
|
319 |
return offset, result |
|
320 |
||
321 |
||
322 |
class LimitOffsetMixIn(object): |
|
323 |
limit = offset = None |
|
324 |
def set_limit_offset(self, limit, offset): |
|
325 |
self.limit = limit |
|
326 |
self.offset = offset or None |
|
327 |
||
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|
328 |
|
0 | 329 |
class Step(object): |
330 |
"""base abstract class for execution step""" |
|
331 |
def __init__(self, plan): |
|
332 |
self.plan = plan |
|
333 |
self.children = [] |
|
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|
334 |
|
0 | 335 |
def execute_child(self): |
336 |
assert len(self.children) == 1 |
|
337 |
return self.children[0].execute() |
|
1802
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|
338 |
|
0 | 339 |
def execute_children(self): |
340 |
for step in self.children: |
|
341 |
step.execute() |
|
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|
342 |
|
0 | 343 |
def execute(self): |
344 |
"""execute this step and store partial (eg this step) results""" |
|
345 |
raise NotImplementedError() |
|
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|
346 |
|
0 | 347 |
def mytest_repr(self): |
348 |
"""return a representation of this step suitable for test""" |
|
349 |
return (self.__class__.__name__,) |
|
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|
350 |
|
0 | 351 |
def test_repr(self): |
352 |
"""return a representation of this step suitable for test""" |
|
353 |
return self.mytest_repr() + ( |
|
354 |
[step.test_repr() for step in self.children],) |
|
355 |
||
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|
356 |
|
0 | 357 |
class OneFetchStep(LimitOffsetMixIn, Step): |
358 |
"""step consisting in fetching data from sources and directly returning |
|
359 |
results |
|
360 |
""" |
|
361 |
def __init__(self, plan, union, sources, inputmap=None): |
|
362 |
Step.__init__(self, plan) |
|
363 |
self.union = union |
|
364 |
self.sources = sources |
|
365 |
self.inputmap = inputmap |
|
366 |
self.set_limit_offset(union.children[-1].limit, union.children[-1].offset) |
|
367 |
||
368 |
def set_limit_offset(self, limit, offset): |
|
369 |
LimitOffsetMixIn.set_limit_offset(self, limit, offset) |
|
370 |
for select in self.union.children: |
|
371 |
select.limit = limit |
|
372 |
select.offset = offset |
|
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|
373 |
|
0 | 374 |
def execute(self): |
375 |
"""call .syntax_tree_search with the given syntax tree on each |
|
376 |
source for each solution |
|
377 |
""" |
|
378 |
self.execute_children() |
|
379 |
session = self.plan.session |
|
380 |
args = self.plan.args |
|
381 |
inputmap = self.inputmap |
|
382 |
union = self.union |
|
383 |
# do we have to use a inputmap from a previous step ? If so disable |
|
384 |
# cachekey |
|
385 |
if inputmap or self.plan.cache_key is None: |
|
386 |
cachekey = None |
|
387 |
# union may have been splited into subqueries, rebuild a cache key |
|
388 |
elif isinstance(self.plan.cache_key, tuple): |
|
389 |
cachekey = list(self.plan.cache_key) |
|
390 |
cachekey[0] = union.as_string() |
|
391 |
cachekey = tuple(cachekey) |
|
392 |
else: |
|
393 |
cachekey = union.as_string() |
|
394 |
result = [] |
|
395 |
# limit / offset processing |
|
396 |
limit = self.limit |
|
397 |
offset = self.offset |
|
398 |
if offset is not None: |
|
399 |
if len(self.sources) > 1: |
|
400 |
# we'll have to deal with limit/offset by ourself |
|
401 |
if union.children[-1].limit: |
|
402 |
union.children[-1].limit = limit + offset |
|
403 |
union.children[-1].offset = None |
|
404 |
else: |
|
405 |
offset, limit = None, None |
|
406 |
for source in self.sources: |
|
407 |
if offset is None and limit is not None: |
|
408 |
# modifying the sample rqlst is enough since sql generation |
|
409 |
# will pick it here as well |
|
410 |
union.children[-1].limit = limit - len(result) |
|
411 |
result_ = source.syntax_tree_search(session, union, args, cachekey, |
|
412 |
inputmap) |
|
413 |
if offset is not None: |
|
414 |
offset, result_ = offset_result(offset, result_) |
|
415 |
result += result_ |
|
416 |
if limit is not None: |
|
417 |
if len(result) >= limit: |
|
418 |
return result[:limit] |
|
419 |
#print 'ONEFETCH RESULT %s' % (result) |
|
420 |
return result |
|
421 |
||
422 |
def mytest_repr(self): |
|
423 |
"""return a representation of this step suitable for test""" |
|
424 |
try: |
|
425 |
inputmap = varmap_test_repr(self.inputmap, self.plan.tablesinorder) |
|
426 |
except AttributeError: |
|
427 |
inputmap = self.inputmap |
|
428 |
return (self.__class__.__name__, |
|
429 |
sorted((r.as_string(kwargs=self.plan.args), r.solutions) |
|
430 |
for r in self.union.children), |
|
431 |
self.limit, self.offset, |
|
432 |
sorted(self.sources), inputmap) |
|
433 |
||
434 |
||
435 |
# UPDATE/INSERT/DELETE steps ################################################## |
|
436 |
||
4764
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[repo] improve planning of insert/update queries: do not select affected constants so the don't go and back to/from the source.
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changeset
|
437 |
class InsertRelationsStep(Step): |
0 | 438 |
"""step consisting in adding attributes/relations to entity defs from a |
439 |
previous FetchStep |
|
440 |
||
441 |
relations values comes from the latest result, with one columns for |
|
2921
8e2544e78a5e
test and fix rset returned by SET query
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parents:
2875
diff
changeset
|
442 |
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
|
443 |
|
0 | 444 |
for one entity definition, we'll construct N entity, where N is the |
445 |
number of the latest result |
|
446 |
""" |
|
1802
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delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
447 |
|
0 | 448 |
FINAL = 0 |
449 |
RELATION = 1 |
|
450 |
REVERSE_RELATION = 2 |
|
1802
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delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
451 |
|
2921
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test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
452 |
def __init__(self, plan, edef, rdefs): |
0 | 453 |
Step.__init__(self, plan) |
454 |
# partial entity definition to expand |
|
2921
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test and fix rset returned by SET query
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parents:
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diff
changeset
|
455 |
self.edef = edef |
0 | 456 |
# definition of relations to complete |
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parents:
2875
diff
changeset
|
457 |
self.rdefs = rdefs |
1802
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delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
458 |
|
0 | 459 |
def execute(self): |
460 |
"""execute this step""" |
|
2921
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test and fix rset returned by SET query
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parents:
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diff
changeset
|
461 |
base_edef = self.edef |
8e2544e78a5e
test and fix rset returned by SET query
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parents:
2875
diff
changeset
|
462 |
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.
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parents:
4252
diff
changeset
|
463 |
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>
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diff
changeset
|
464 |
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
|
465 |
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
|
466 |
result = [[]] |
2921
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test and fix rset returned by SET query
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parents:
2875
diff
changeset
|
467 |
for row in result: |
0 | 468 |
# get a new entity definition for this row |
2921
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test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
469 |
edef = copy(base_edef) |
0 | 470 |
# 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.
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diff
changeset
|
471 |
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.
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diff
changeset
|
472 |
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>
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diff
changeset
|
473 |
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>
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diff
changeset
|
474 |
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>
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diff
changeset
|
475 |
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.
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parents:
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diff
changeset
|
476 |
if rorder == InsertRelationsStep.FINAL: |
4970
1f3d8946ea84
fix security issue introduced by 4967:04543ed0bbdc: attributes explicitly set by hooks should not be checked by security hooks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4869
diff
changeset
|
477 |
edef.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:
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diff
changeset
|
478 |
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
|
479 |
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>
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diff
changeset
|
480 |
edef.querier_pending_relations[(rtype, 'subject')] = value |
0 | 481 |
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
|
482 |
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:
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diff
changeset
|
483 |
edef.querier_pending_relations[(rtype, 'object')] = value |
2921
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test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
484 |
edefs.append(edef) |
8e2544e78a5e
test and fix rset returned by SET query
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
2875
diff
changeset
|
485 |
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
|
486 |
return result |
0 | 487 |
|
488 |
class InsertStep(Step): |
|
489 |
"""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
|
490 |
|
0 | 491 |
def execute(self): |
492 |
"""execute this step""" |
|
493 |
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>
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4252
diff
changeset
|
494 |
assert isinstance(step, InsertRelationsStep) |
0 | 495 |
step.plan = self.plan |
496 |
step.execute() |
|
497 |
# insert entities first |
|
498 |
result = self.plan.insert_entity_defs() |
|
499 |
# then relation |
|
500 |
self.plan.insert_relation_defs() |
|
501 |
# return eids of inserted entities |
|
502 |
return result |
|
503 |
||
504 |
||
505 |
class DeleteEntitiesStep(Step): |
|
506 |
"""step consisting in deleting entities""" |
|
507 |
||
508 |
def execute(self): |
|
509 |
"""execute this step""" |
|
3648
665c37544060
on entity deletion query, return eids of deleted entities
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
3437
diff
changeset
|
510 |
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
|
511 |
todelete = frozenset(typed_eid(eid) for eid, in results) |
0 | 512 |
session = self.plan.session |
513 |
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
|
514 |
# 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
|
515 |
# 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
|
516 |
# 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
|
517 |
try: |
adc2122eed03
[repo] more efficient eid cache operations handling based on set_operation; refactor
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
5058
diff
changeset
|
518 |
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
|
519 |
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
|
520 |
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
|
521 |
CleanupDeletedEidsCacheOp(session) |
0 | 522 |
actual = todelete - pending |
523 |
pending |= actual |
|
524 |
for eid in actual: |
|
525 |
delete(session, eid) |
|
3648
665c37544060
on entity deletion query, return eids of deleted entities
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
3437
diff
changeset
|
526 |
return results |
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
527 |
|
0 | 528 |
class DeleteRelationsStep(Step): |
529 |
"""step consisting in deleting relations""" |
|
530 |
||
531 |
def __init__(self, plan, rtype): |
|
532 |
Step.__init__(self, plan) |
|
533 |
self.rtype = rtype |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
534 |
|
0 | 535 |
def execute(self): |
536 |
"""execute this step""" |
|
537 |
session = self.plan.session |
|
538 |
delete = session.repo.glob_delete_relation |
|
539 |
for subj, obj in self.execute_child(): |
|
540 |
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
|
541 |
|
0 | 542 |
|
543 |
class UpdateStep(Step): |
|
544 |
"""step consisting in updating entities / adding relations from relations |
|
545 |
definitions and from results fetched in previous step |
|
546 |
""" |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
547 |
|
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
|
548 |
def __init__(self, plan, updatedefs, attributes): |
0 | 549 |
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
|
550 |
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
|
551 |
self.attributes = attributes |
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1016
diff
changeset
|
552 |
|
0 | 553 |
def execute(self): |
554 |
"""execute this step""" |
|
555 |
session = self.plan.session |
|
556 |
repo = session.repo |
|
557 |
edefs = {} |
|
558 |
# 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
|
559 |
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
|
560 |
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
|
561 |
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
|
562 |
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
|
563 |
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
|
564 |
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
|
565 |
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
|
566 |
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
|
567 |
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
|
568 |
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
|
569 |
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
|
570 |
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
|
571 |
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
|
572 |
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
|
573 |
edefs[eid] = edef = session.entity_from_eid(eid) |
4970
1f3d8946ea84
fix security issue introduced by 4967:04543ed0bbdc: attributes explicitly set by hooks should not be checked by security hooks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
4869
diff
changeset
|
574 |
edef.rql_set_value(str(rschema), rhsval) |
0 | 575 |
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
|
576 |
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
|
577 |
result[i] = newrow |
0 | 578 |
# update entities |
579 |
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
|
580 |
repo.glob_update_entity(session, edef, set(self.attributes)) |
0 | 581 |
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
|
582 |
|
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 |
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
|
584 |
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
|
585 |
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
|
586 |
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
|
587 |
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
|
588 |
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
|
589 |
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
|
590 |
return val |