allpaths.c:find_join_paths(): compute_rel_size() shouldn't be called
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...
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@ -7,7 +7,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.8 1997/06/02 11:14:40 vadim Exp $
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.9 1997/06/05 09:33:50 vadim Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -216,7 +216,9 @@ find_join_paths(Query *root, List *outer_rels, int levels_left)
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foreach(x, new_rels) {
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rel = (Rel*)lfirst(x);
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#if 0 /* compute_joinrel_size already called by prune_rel_paths */
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rel->size = compute_rel_size(rel);
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#endif
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rel->width = compute_rel_width(rel);
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/*#define OPTIMIZER_DEBUG*/
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@ -7,7 +7,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/joinrels.c,v 1.3 1997/05/20 10:37:26 vadim Exp $
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/joinrels.c,v 1.4 1997/06/05 09:33:52 vadim Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -110,7 +110,8 @@ find_clause_joins(Query *root, Rel *outer_rel, List *joininfo_list)
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get_base_rel(root, lfirsti(other_rels)),
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joininfo);
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/* how about right-sided plan ? */
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if ( _use_right_sided_plans_ )
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if ( _use_right_sided_plans_ &&
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length (outer_rel->relids) > 1 )
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{
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if (rel != NULL)
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join_list = lappend(join_list, rel);
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