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Add selectivity-calculation code for RowCompareExpr nodes. Simplistic,

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but a lot better than nothing at all ...
This commit is contained in:
Tom Lane
2006-01-14 00:14:12 +00:00
parent 39fc1fb07a
commit 34f8ee9737
3 changed files with 73 additions and 3 deletions
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5
src/include/utils/selfuncs.h
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@@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/selfuncs.h,v 1.26 2005/11/25 19:47:50 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/selfuncs.h,v 1.27 2006/01/14 00:14:12 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -116,6 +116,9 @@ extern Selectivity scalararraysel(PlannerInfo *root,
ScalarArrayOpExpr *clause,
bool is_join_clause,
int varRelid, JoinType jointype);
extern Selectivity rowcomparesel(PlannerInfo *root,
RowCompareExpr *clause,
int varRelid, JoinType jointype);
extern void mergejoinscansel(PlannerInfo *root, Node *clause,
Selectivity *leftscan,