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Planner failed to be smart about binary-compatible expressions in pathkeys

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and hash bucket-size estimation.  Issue has been there awhile but is more
critical in 7.4 because it affects varchar columns.  Per report from
Greg Stark.
This commit is contained in:
Tom Lane
2003-12-03 17:45:10 +00:00
parent 32580efafb
commit 7f8f7665fc
4 changed files with 64 additions and 13 deletions
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25
src/backend/utils/cache/lsyscache.c vendored
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/cache/lsyscache.c,v 1.111 2003/11/29 19:52:00 pgsql Exp $
* $PostgreSQL: pgsql/src/backend/utils/cache/lsyscache.c,v 1.112 2003/12/03 17:45:09 tgl Exp $
*
* NOTES
* Eventually, the index information should go through here, too.
@ -465,6 +465,29 @@ get_opname(Oid opno)
return NULL;
}
/*
* op_input_types
*
* Returns the left and right input datatypes for an operator
* (InvalidOid if not relevant).
*/
void
op_input_types(Oid opno, Oid *lefttype, Oid *righttype)
{
HeapTuple tp;
Form_pg_operator optup;
tp = SearchSysCache(OPEROID,
ObjectIdGetDatum(opno),
0, 0, 0);
if (!HeapTupleIsValid(tp)) /* shouldn't happen */
elog(ERROR, "cache lookup failed for operator %u", opno);
optup = (Form_pg_operator) GETSTRUCT(tp);
*lefttype = optup->oprleft;
*righttype = optup->oprright;
ReleaseSysCache(tp);
}
/*
* op_mergejoinable
*