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Tweak planner so that index expressions and predicates are matched to

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queries without regard to whether coercions are stated explicitly or
implicitly.  Per suggestion from Stephan Szabo.
This commit is contained in:
Tom Lane
2004-03-14 23:41:27 +00:00
parent e1d08faf04
commit 04226b6404
5 changed files with 58 additions and 10 deletions
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14
src/backend/utils/cache/relcache.c vendored
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.198 2004/02/25 19:41:23 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.199 2004/03/14 23:41:27 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -2687,6 +2687,12 @@ RelationGetIndexExpressions(Relation relation)
result = (List *) eval_const_expressions((Node *) result);
/*
* Also mark any coercion format fields as "don't care", so that the
* planner can match to both explicit and implicit coercions.
*/
set_coercionform_dontcare((Node *) result);
/* May as well fix opfuncids too */
fix_opfuncids((Node *) result);
@ -2755,6 +2761,12 @@ RelationGetIndexPredicate(Relation relation)
result = (List *) eval_const_expressions((Node *) result);
/*
* Also mark any coercion format fields as "don't care", so that the
* planner can match to both explicit and implicit coercions.
*/
set_coercionform_dontcare((Node *) result);
/* Also convert to implicit-AND format */
result = make_ands_implicit((Expr *) result);