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Add missing correction of sublevelsup when pulling up a subquery.

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Fixes problem with cases like
SELECT * FROM foo t WHERE NOT EXISTS (SELECT remoteid FROM
(SELECT f1 as remoteid FROM foo WHERE f1 = t.f1) AS t1)
This commit is contained in:
Tom Lane 2002-09-24 18:38:23 +00:00
parent 44f68fc7bd
commit 83fd58dff0
1 changed files with 9 additions and 3 deletions
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12
src/backend/optimizer/plan/planner.c
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@ -8,7 +8,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.124 2002/09/04 20:31:21 momjian Exp $ * $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.125 2002/09/24 18:38:23 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -337,17 +337,23 @@ pull_up_subqueries(Query *parse, Node *jtnode, bool below_outer_join)
/* /*
* Now make a modifiable copy of the subquery that we can run * Now make a modifiable copy of the subquery that we can run
* OffsetVarNodes on. * OffsetVarNodes and IncrementVarSublevelsUp on.
*/ */
subquery = copyObject(subquery); subquery = copyObject(subquery);
/* /*
* Adjust varnos in subquery so that we can append its * Adjust level-0 varnos in subquery so that we can append its
* rangetable to upper query's. * rangetable to upper query's.
*/ */
rtoffset = length(parse->rtable); rtoffset = length(parse->rtable);
OffsetVarNodes((Node *) subquery, rtoffset, 0); OffsetVarNodes((Node *) subquery, rtoffset, 0);
/*
* Upper-level vars in subquery are now one level closer to their
* parent than before.
*/
IncrementVarSublevelsUp((Node *) subquery, -1, 1);
/* /*
* Replace all of the top query's references to the subquery's * Replace all of the top query's references to the subquery's
* outputs with copies of the adjusted subtlist items, being * outputs with copies of the adjusted subtlist items, being