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Change the planner to allow indexscan qualification clauses to use

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nonconsecutive columns of a multicolumn index, as per discussion around
mid-May (pghackers thread "Best way to scan on-disk bitmaps").  This
turns out to require only minimal changes in btree, and so far as I can
see none at all in GiST.  btcostestimate did need some work, but its
original assumption that index selectivity == heap selectivity was
quite bogus even before this.
This commit is contained in:
Tom Lane
2005-06-13 23:14:49 +00:00
parent 077811605e
commit c186c93148
12 changed files with 208 additions and 114 deletions
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3
src/include/access/genam.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/genam.h,v 1.51 2005/05/27 23:31:21 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/genam.h,v 1.52 2005/06/13 23:14:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -101,7 +101,6 @@ extern IndexBulkDeleteResult *index_bulk_delete(Relation indexRelation,
extern IndexBulkDeleteResult *index_vacuum_cleanup(Relation indexRelation,
IndexVacuumCleanupInfo *info,
IndexBulkDeleteResult *stats);
extern RegProcedure index_cost_estimator(Relation indexRelation);
extern RegProcedure index_getprocid(Relation irel, AttrNumber attnum,
uint16 procnum);
extern FmgrInfo *index_getprocinfo(Relation irel, AttrNumber attnum,