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create_unique_plan() should not discard existing output columns of the

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subplan it starts with, as they may be needed at upper join levels.
See comments added to code for the non-obvious reason why.  Per bug report
from Robert Creager.
This commit is contained in:
Tom Lane
2003-08-07 19:20:24 +00:00
parent d862045dfc
commit ecbed6e1b9
5 changed files with 94 additions and 37 deletions
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5
src/include/parser/parse_clause.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_clause.h,v 1.35 2003/08/04 02:40:14 momjian Exp $
* $Id: parse_clause.h,v 1.36 2003/08/07 19:20:23 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -35,6 +35,9 @@ extern List *transformDistinctClause(ParseState *pstate, List *distinctlist,
extern List *addAllTargetsToSortList(ParseState *pstate,
List *sortlist, List *targetlist,
bool resolveUnknown);
extern List *addTargetToSortList(ParseState *pstate, TargetEntry *tle,
List *sortlist, List *targetlist,
List *opname, bool resolveUnknown);
extern Index assignSortGroupRef(TargetEntry *tle, List *tlist);
extern bool targetIsInSortList(TargetEntry *tle, List *sortList);