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GROUP BY got confused if there were multiple equal() GROUP BY items.

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This bug has been latent since 7.0 or maybe even further back, but it
was only exposed when parse_clause.c stopped suppressing duplicate
items (see its rev 1.96 of 18-Aug-02).
This commit is contained in:
Tom Lane
2003-03-13 16:58:35 +00:00
parent 706a32cdf6
commit 6c4996fa6b
1 changed files with 4 additions and 2 deletions
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6
src/backend/optimizer/plan/planner.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.151 2003/03/10 03:53:50 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.152 2003/03/13 16:58:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1489,13 +1489,14 @@ make_groupsortplan(Query *parse,
Plan *subplan)
{
List *sort_tlist = new_unsorted_tlist(subplan->targetlist);
int grpno = 0;
int keyno = 0;
List *gl;
foreach(gl, groupClause)
{
GroupClause *grpcl = (GroupClause *) lfirst(gl);
TargetEntry *te = nth(grpColIdx[keyno] - 1, sort_tlist);
TargetEntry *te = nth(grpColIdx[grpno] - 1, sort_tlist);
Resdom *resdom = te->resdom;
/*
@ -1509,6 +1510,7 @@ make_groupsortplan(Query *parse,
resdom->reskey = ++keyno;
resdom->reskeyop = grpcl->sortop;
}
grpno++;
}
Assert(keyno > 0);