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Push subplan clauses to the back in qual lists for join plans, not 

only scan plans.  Per observation from Rod Taylor.
This commit is contained in:
Tom Lane 2003-08-26 22:56:51 +00:00
parent 147c16497b
commit 73e3edf2e6
1 changed files with 15 additions and 1 deletions
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16
src/backend/optimizer/plan/createplan.c
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/createplan.c,v 1.155 2003/08/17 19:58:05 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/createplan.c,v 1.156 2003/08/26 22:56:51 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -944,6 +944,10 @@ create_nestloop_plan(Query *root,
otherclauses = NIL;
}
/* Sort clauses into best execution order */
joinclauses = order_qual_clauses(root, joinclauses);
otherclauses = order_qual_clauses(root, otherclauses);
join_plan = make_nestloop(tlist,
joinclauses,
otherclauses,
@ -995,6 +999,11 @@ create_mergejoin_plan(Query *root,
mergeclauses = get_switched_clauses(best_path->path_mergeclauses,
best_path->jpath.outerjoinpath->parent->relids);
/* Sort clauses into best execution order */
joinclauses = order_qual_clauses(root, joinclauses);
otherclauses = order_qual_clauses(root, otherclauses);
mergeclauses = order_qual_clauses(root, mergeclauses);
/*
* Create explicit sort nodes for the outer and inner join paths if
* necessary. The sort cost was already accounted for in the path.
@ -1078,6 +1087,11 @@ create_hashjoin_plan(Query *root,
hashclauses = get_switched_clauses(best_path->path_hashclauses,
best_path->jpath.outerjoinpath->parent->relids);
/* Sort clauses into best execution order */
joinclauses = order_qual_clauses(root, joinclauses);
otherclauses = order_qual_clauses(root, otherclauses);
hashclauses = order_qual_clauses(root, hashclauses);
/*
* Extract the inner hash keys (right-hand operands of the
* hashclauses) to put in the Hash node.