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Don't treat NEW and OLD as reserved words anymore. For the purposes of rules

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it works just as well to have them be ordinary identifiers, and this gets rid
of a number of ugly special cases.  Plus we aren't interfering with non-rule
usage of these names.

catversion bump because the names change internally in stored rules.
This commit is contained in:
Tom Lane
2009-11-05 23:24:27 +00:00
parent 45d7e04fce
commit 593f4b854a
18 changed files with 84 additions and 156 deletions
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6
src/backend/rewrite/rewriteDefine.c
View File

@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteDefine.c,v 1.138 2009/06/11 14:49:01 momjian Exp $
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteDefine.c,v 1.139 2009/11/05 23:24:24 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -601,9 +601,9 @@ checkRuleResultList(List *targetList, TupleDesc resultDesc, bool isSelect)
* Recursively scan a query or expression tree and set the checkAsUser
* field to the given userid in all rtable entries.
*
* Note: for a view (ON SELECT rule), the checkAsUser field of the *OLD*
* Note: for a view (ON SELECT rule), the checkAsUser field of the OLD
* RTE entry will be overridden when the view rule is expanded, and the
* checkAsUser field of the *NEW* entry is irrelevant because that entry's
* checkAsUser field of the NEW entry is irrelevant because that entry's
* requiredPerms bits will always be zero. However, for other types of rules
* it's important to set these fields to match the rule owner. So we just set
* them always.

6
src/backend/rewrite/rewriteHandler.c
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteHandler.c,v 1.191 2009/10/28 17:36:50 tgl Exp $
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteHandler.c,v 1.192 2009/11/05 23:24:24 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -325,7 +325,7 @@ rewriteRuleAction(Query *parsetree,
OffsetVarNodes((Node *) sub_action, rt_length, 0);
OffsetVarNodes(rule_qual, rt_length, 0);
/* but references to *OLD* should point at original rt_index */
/* but references to OLD should point at original rt_index */
ChangeVarNodes((Node *) sub_action,
PRS2_OLD_VARNO + rt_length, rt_index, 0);
ChangeVarNodes(rule_qual,
@@ -1190,7 +1190,7 @@ ApplyRetrieveRule(Query *parsetree,
/*
* We move the view's permission check data down to its rangetable. The
* checks will actually be done against the *OLD* entry therein.
* checks will actually be done against the OLD entry therein.
*/
subrte = rt_fetch(PRS2_OLD_VARNO, rule_action->rtable);
Assert(subrte->relid == relation->rd_id);

12
src/backend/rewrite/rewriteManip.c
View File

@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteManip.c,v 1.124 2009/10/26 02:26:38 tgl Exp $
* $PostgreSQL: pgsql/src/backend/rewrite/rewriteManip.c,v 1.125 2009/11/05 23:24:24 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -940,15 +940,15 @@ getInsertSelectQuery(Query *parsetree, Query ***subquery_ptr)
/*
* Currently, this is ONLY applied to rule-action queries, and so we
* expect to find the *OLD* and *NEW* placeholder entries in the given
* expect to find the OLD and NEW placeholder entries in the given
* query. If they're not there, it must be an INSERT/SELECT in which
* they've been pushed down to the SELECT.
*/
if (list_length(parsetree->rtable) >= 2 &&
strcmp(rt_fetch(PRS2_OLD_VARNO, parsetree->rtable)->eref->aliasname,
"*OLD*") == 0 &&
"old") == 0 &&
strcmp(rt_fetch(PRS2_NEW_VARNO, parsetree->rtable)->eref->aliasname,
"*NEW*") == 0)
"new") == 0)
return parsetree;
Assert(parsetree->jointree && IsA(parsetree->jointree, FromExpr));
if (list_length(parsetree->jointree->fromlist) != 1)
@@ -962,9 +962,9 @@ getInsertSelectQuery(Query *parsetree, Query ***subquery_ptr)
elog(ERROR, "expected to find SELECT subquery");
if (list_length(selectquery->rtable) >= 2 &&
strcmp(rt_fetch(PRS2_OLD_VARNO, selectquery->rtable)->eref->aliasname,
"*OLD*") == 0 &&
"old") == 0 &&
strcmp(rt_fetch(PRS2_NEW_VARNO, selectquery->rtable)->eref->aliasname,
"*NEW*") == 0)
"new") == 0)
{
if (subquery_ptr)
*subquery_ptr = &(selectrte->subquery);