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Consider right-sided plans if _use_right_sided_plans_ is true.

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This commit is contained in:
Vadim B. Mikheev
1997-05-20 10:37:26 +00:00
parent c4ab256383
commit 4a8c3dddc3
1 changed files with 15 additions and 1 deletions
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16
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 1.2 1997/02/20 02:54:09 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/joinrels.c,v 1.3 1997/05/20 10:37:26 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@@ -23,6 +23,11 @@
#include "optimizer/joininfo.h"
#include "optimizer/pathnode.h"
#ifdef USE_RIGHT_SIDED_PLANS
bool _use_right_sided_plans_ = true;
#else
bool _use_right_sided_plans_ = false;
#endif
static List *find_clause_joins(Query *root, Rel *outer_rel, List *joininfo_list);
static List *find_clauseless_joins(Rel *outer_rel, List *inner_rels);
@@ -104,6 +109,15 @@ find_clause_joins(Query *root, Rel *outer_rel, List *joininfo_list)
rel = init_join_rel(outer_rel,
get_base_rel(root, lfirsti(other_rels)),
joininfo);
/* how about right-sided plan ? */
if ( _use_right_sided_plans_ )
{
if (rel != NULL)
join_list = lappend(join_list, rel);
rel = init_join_rel(get_base_rel(root, lfirsti(other_rels)),
outer_rel,
joininfo);
}
} else if (BushyPlanFlag) {
rel = init_join_rel(outer_rel,
get_join_rel(root, other_rels),