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Fix oversight in MIN/MAX optimization: must not return NULL entries

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from index, since the aggregates ignore NULLs.
This commit is contained in:
Tom Lane
2005-04-12 05:11:28 +00:00
parent 2e7a68896b
commit 7ace43e0c2
3 changed files with 29 additions and 15 deletions
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3
src/include/optimizer/planmain.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/optimizer/planmain.h,v 1.81 2005/04/11 23:06:56 tgl Exp $
* $PostgreSQL: pgsql/src/include/optimizer/planmain.h,v 1.82 2005/04/12 05:11:28 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -40,6 +40,7 @@ extern Sort *make_sort_from_sortclauses(Query *root, List *sortcls,
Plan *lefttree);
extern Sort *make_sort_from_groupcols(Query *root, List *groupcls,
AttrNumber *grpColIdx, Plan *lefttree);
extern List *order_qual_clauses(Query *root, List *clauses);
extern Agg *make_agg(Query *root, List *tlist, List *qual,
AggStrategy aggstrategy,
int numGroupCols, AttrNumber *grpColIdx,