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Divide functions into three volatility classes (immutable, stable, and

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volatile), rather than the old cachable/noncachable distinction.  This
allows indexscan optimizations in many places where we formerly didn't.
Also, add a pronamespace column to pg_proc (it doesn't do anything yet,
however).
This commit is contained in:
Tom Lane
2002-04-05 00:31:36 +00:00
parent 0e11aea246
commit 4bdb4be62e
26 changed files with 1668 additions and 1542 deletions
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5
src/include/optimizer/clauses.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: clauses.h,v 1.50 2001/12/10 22:54:12 tgl Exp $
* $Id: clauses.h,v 1.51 2002/04/05 00:31:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -48,7 +48,8 @@ extern bool contain_subplans(Node *clause);
extern List *pull_subplans(Node *clause);
extern void check_subplans_for_ungrouped_vars(Query *query);
extern bool contain_noncachable_functions(Node *clause);
extern bool contain_mutable_functions(Node *clause);
extern bool contain_volatile_functions(Node *clause);
extern bool is_pseudo_constant_clause(Node *clause);
extern List *pull_constant_clauses(List *quals, List **constantQual);