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Use GEQO if _use_geqo_ is TRUE and # of relations is >= _use_geqo_rels_

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(both are settable via SET geqo TO ...).
This commit is contained in:
Vadim B. Mikheev 1997-06-02 11:14:40 +00:00
parent cda886fd06
commit 05404562fb
1 changed files with 3 additions and 2 deletions
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5
src/backend/optimizer/path/allpaths.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.7 1997/06/01 02:55:44 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.8 1997/06/02 11:14:40 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -38,6 +38,7 @@ bool _use_geqo_ = true;
#else
bool _use_geqo_ = false;
#endif
int32 _use_geqo_rels_ = GEQO_RELS;
static void find_rel_paths(Query *root, List *rels);
@ -173,7 +174,7 @@ find_join_paths(Query *root, List *outer_rels, int levels_left)
* <utesch@aut.tu-freiberg.de> *
*******************************************/
if ( (_use_geqo_) || length(root->base_relation_list_) >= GEQO_RELS )
if ( (_use_geqo_) && length(root->base_relation_list_) >= _use_geqo_rels_ )
return lcons(geqo(root), NIL); /* returns *one* Rel, so lcons it */
/*******************************************