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query_tree_mutator should copy RangeTblEntry nodes even when it's not

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planning to modify them itself.  Otherwise we end up with shared RTE
substructure, which breaks inheritance_planner because the rte->inh
flag needs to be independent in each copied subquery.  Per bug report
from Chris Piker.
This commit is contained in:
Tom Lane 2003-12-09 01:56:20 +00:00
parent ee719299e4
commit 2d83e7c73c
1 changed files with 4 additions and 9 deletions
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13
src/backend/optimizer/util/clauses.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/util/clauses.c,v 1.155 2003/11/29 19:51:51 pgsql Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/util/clauses.c,v 1.156 2003/12/09 01:56:20 tgl Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -2960,36 +2960,31 @@ query_tree_mutator(Query *query,
RangeTblEntry *rte = (RangeTblEntry *) lfirst(rt);
RangeTblEntry *newrte;
FLATCOPY(newrte, rte, RangeTblEntry);
switch (rte->rtekind)
{
case RTE_RELATION:
case RTE_SPECIAL:
/* nothing to do, don't bother to make a copy */
/* we don't bother to copy eref, aliases, etc; OK? */
break;
case RTE_SUBQUERY:
if (!(flags & QTW_IGNORE_RT_SUBQUERIES))
{
FLATCOPY(newrte, rte, RangeTblEntry);
CHECKFLATCOPY(newrte->subquery, rte->subquery, Query);
MUTATE(newrte->subquery, newrte->subquery, Query *);
rte = newrte;
}
break;
case RTE_JOIN:
if (!(flags & QTW_IGNORE_JOINALIASES))
{
FLATCOPY(newrte, rte, RangeTblEntry);
MUTATE(newrte->joinaliasvars, rte->joinaliasvars, List *);
rte = newrte;
}
break;
case RTE_FUNCTION:
FLATCOPY(newrte, rte, RangeTblEntry);
MUTATE(newrte->funcexpr, rte->funcexpr, Node *);
rte = newrte;
break;
}
FastAppend(&newrt, rte);
FastAppend(&newrt, newrte);
}
query->rtable = FastListValue(&newrt);
return query;