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First cut at making indexscan cost estimates depend on correlation

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between index order and table order.
This commit is contained in:
Tom Lane
2001-05-09 23:13:37 +00:00
parent e02033572d
commit c23bc6fbb0
8 changed files with 317 additions and 88 deletions
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4
src/include/optimizer/var.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: var.h,v 1.13 2001/04/18 20:42:55 tgl Exp $
* $Id: var.h,v 1.14 2001/05/09 23:13:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -17,6 +17,8 @@
#include "nodes/primnodes.h"
extern List *pull_varnos(Node *node);
extern bool contain_var_reference(Node *node, int varno, int varattno,
int levelsup);
extern bool contain_whole_tuple_var(Node *node, int varno, int levelsup);
extern bool contain_var_clause(Node *node);
extern List *pull_var_clause(Node *node, bool includeUpperVars);