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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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6
src/backend/nodes/readfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.114 2002/02/26 22:47:07 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.115 2002/03/01 06:01:18 tgl Exp $
*
* NOTES
* Most of the read functions for plan nodes are tested. (In fact, they
@ -1846,9 +1846,11 @@ _readRestrictInfo(void)
local_node->eval_cost = -1;
/* ditto for this_selec */
local_node->this_selec = -1;
/* ditto for cached pathkeys and bucketsize */
/* ditto for cached pathkeys, selectivity, bucketsize */
local_node->left_pathkey = NIL;
local_node->right_pathkey = NIL;
local_node->left_mergescansel = -1;
local_node->right_mergescansel = -1;
local_node->left_bucketsize = -1;
local_node->right_bucketsize = -1;