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Repair oversight in recent change of dependency extraction code: when

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recursing to handle a join alias var, the context had better be set to
be appropriate to the join var's query level.  Per report from Hristo Neshev.
This commit is contained in:
Tom Lane 2002-12-04 20:00:37 +00:00
parent 20f2872467
commit 53e2b794f9
1 changed files with 7 additions and 1 deletions
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8
src/backend/catalog/dependency.c
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@ -8,7 +8,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/catalog/dependency.c,v 1.13 2002/11/30 21:25:04 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/catalog/dependency.c,v 1.14 2002/12/04 20:00:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -789,6 +789,11 @@ find_expr_references_walker(Node *node,
else if (rte->rtekind == RTE_JOIN)
{
/* Scan join output column to add references to join inputs */
List *save_rtables;
/* We must make the context appropriate for join's level */
save_rtables = context->rtables;
context->rtables = rtables;
if (var->varattno <= 0 ||
var->varattno > length(rte->joinaliasvars))
elog(ERROR, "find_expr_references_walker: bogus varattno %d",
@ -796,6 +801,7 @@ find_expr_references_walker(Node *node,
find_expr_references_walker((Node *) nth(var->varattno - 1,
rte->joinaliasvars),
context);
context->rtables = save_rtables;
}
return false;
}