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Second thoughts dept: arrange to cache mergejoin scan selectivity

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in RestrictInfo nodes, instead of recomputing on every use.
This commit is contained in:
Tom Lane
2002-03-01 06:01:20 +00:00
parent f8c109528c
commit 8f0a9e85b3
6 changed files with 34 additions and 13 deletions
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4
src/backend/nodes/copyfuncs.c
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@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.163 2002/02/26 22:47:05 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.164 2002/03/01 06:01:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1406,6 +1406,8 @@ _copyRestrictInfo(RestrictInfo *from)
*/
newnode->left_pathkey = NIL;
newnode->right_pathkey = NIL;
newnode->left_mergescansel = from->left_mergescansel;
newnode->right_mergescansel = from->right_mergescansel;
newnode->hashjoinoperator = from->hashjoinoperator;
newnode->left_bucketsize = from->left_bucketsize;
newnode->right_bucketsize = from->right_bucketsize;