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Tighten selection of equality and ordering operators for grouping

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operations: make sure we use operators that are compatible, as determined
by a mergejoin link in pg_operator.  Also, add code to planner to ensure
we don't try to use hashed grouping when the grouping operators aren't
marked hashable.
This commit is contained in:
Tom Lane
2002-11-29 21:39:12 +00:00
parent 851a4c48fd
commit f68f11928d
8 changed files with 167 additions and 81 deletions
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9
src/backend/utils/adt/ri_triggers.c
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@ -17,7 +17,7 @@
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/backend/utils/adt/ri_triggers.c,v 1.43 2002/10/03 21:06:23 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/ri_triggers.c,v 1.44 2002/11/29 21:39:11 tgl Exp $
*
* ----------
*/
@ -3669,12 +3669,7 @@ ri_AttributesEqual(Oid typeid, Datum oldvalue, Datum newvalue)
Oid opr_proc;
FmgrInfo finfo;
opr_proc = compatible_oper_funcid(makeList1(makeString("=")),
typeid, typeid, true);
if (!OidIsValid(opr_proc))
elog(ERROR,
"ri_AttributesEqual(): cannot find '=' operator for type %u",
typeid);
opr_proc = equality_oper_funcid(typeid);
/*
* Since fmgr_info could fail, call it *before* creating the