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Extend join-selectivity API (oprjoin interface) so that join type is

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passed to join selectivity estimators.  Make use of this in eqjoinsel
to derive non-bogus selectivity for IN clauses.  Further tweaking of
cost estimation for IN.
initdb forced because of pg_proc.h changes.
This commit is contained in:
Tom Lane
2003-01-28 22:13:41 +00:00
parent 955a1f81a7
commit 2e46b762eb
16 changed files with 222 additions and 137 deletions
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4
src/backend/optimizer/plan/subselect.c
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/subselect.c,v 1.68 2003/01/20 18:54:53 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/subselect.c,v 1.69 2003/01/28 22:13:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -351,7 +351,7 @@ make_subplan(SubLink *slink, List *lefthand, bool isTopQual)
qualsel = clauselist_selectivity(subquery,
plan->qual,
0);
0, JOIN_INNER);
/* Is 10% selectivity a good threshold?? */
use_material = qualsel < 0.10;
}