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Make 'col IS NULL' clauses be indexable conditions.

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Teodor Sigaev, with some kibitzing from Tom Lane.
This commit is contained in:
Tom Lane
2007-04-06 22:33:43 +00:00
parent 146c83c045
commit f02a82b6ad
19 changed files with 432 additions and 110 deletions
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3
src/include/nodes/relation.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.139 2007/02/27 01:11:26 tgl Exp $
* $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.140 2007/04/06 22:33:43 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -397,6 +397,7 @@ typedef struct IndexOptInfo
bool predOK; /* true if predicate matches query */
bool unique; /* true if a unique index */
bool amoptionalkey; /* can query omit key for the first column? */
bool amsearchnulls; /* can AM search for NULL index entries? */
} IndexOptInfo;