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allpaths.c:find_join_paths(): compute_rel_size() shouldn't be called

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for join-relations. Sizes already computed by
prune_rel_paths():compute_joinrel_size().

joinrels.c:
<                   if ( _use_right_sided_plans_ )
---
>                   if ( _use_right_sided_plans_ &&
>                               length (outer_rel->relids) > 1 )

 - r_plans are useful when outer_rel is join-relation... It
decreases the size of search space...
This commit is contained in:
Vadim B. Mikheev
1997-06-05 09:33:52 +00:00
parent 39c73eff63
commit 11073bee5c
2 changed files with 6 additions and 3 deletions
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5
src/backend/optimizer/path/joinrels.c
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@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/joinrels.c,v 1.3 1997/05/20 10:37:26 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/joinrels.c,v 1.4 1997/06/05 09:33:52 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@@ -110,7 +110,8 @@ find_clause_joins(Query *root, Rel *outer_rel, List *joininfo_list)
get_base_rel(root, lfirsti(other_rels)),
joininfo);
/* how about right-sided plan ? */
if ( _use_right_sided_plans_ )
if ( _use_right_sided_plans_ &&
length (outer_rel->relids) > 1 )
{
if (rel != NULL)
join_list = lappend(join_list, rel);