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Upgrade planner and executor to allow multiple hash keys for a hash join,

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instead of only one.  This should speed up planning (only one hash path
to consider for a given pair of relations) as well as allow more effective
hashing, when there are multiple hashable joinclauses.
This commit is contained in:
Tom Lane
2002-11-30 00:08:22 +00:00
parent f68f11928d
commit ddb2d78de0
14 changed files with 182 additions and 133 deletions
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4
src/backend/optimizer/plan/subselect.c
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/subselect.c,v 1.56 2002/11/26 03:01:58 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/subselect.c,v 1.57 2002/11/30 00:08:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -677,7 +677,7 @@ SS_finalize_plan(Plan *plan, List *rtable)
break;
case T_Hash:
finalize_primnode(((Hash *) plan)->hashkey,
finalize_primnode((Node *) ((Hash *) plan)->hashkeys,
&results);
break;