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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/optimizer/prep/prepunion.c
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@ -14,7 +14,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.69 2001/11/12 20:04:20 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.70 2002/03/01 06:01:20 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -777,6 +777,8 @@ adjust_inherited_attrs_mutator(Node *node,
newinfo->this_selec = -1;
newinfo->left_pathkey = NIL; /* and these */
newinfo->right_pathkey = NIL;
newinfo->left_mergescansel = -1;
newinfo->right_mergescansel = -1;
newinfo->left_bucketsize = -1;
newinfo->right_bucketsize = -1;