diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2001-06-05 17:13:52 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2001-06-05 17:13:52 +0000 |
| commit | cdd230d62899455cc07ba1caf68387fb834d5bd2 (patch) | |
| tree | c74a0a5342eb883c0265f7caf2993a93e1eff939 /src/include/optimizer/paths.h | |
| parent | 7c579fa12df0def35192e1e3cfc9ea7ab90bb0cb (diff) | |
Improve planning of OR indexscan plans: for quals like
WHERE (a = 1 or a = 2) and b = 42
and an index on (a,b), include the clause b = 42 in the indexquals
generated for each arm of the OR clause. Essentially this is an index-
driven conversion from CNF to DNF. Implementation is a bit klugy, but
better than not exploiting the extra quals at all ...
Diffstat (limited to 'src/include/optimizer/paths.h')
| -rw-r--r-- | src/include/optimizer/paths.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/src/include/optimizer/paths.h b/src/include/optimizer/paths.h index 39afe74d2ad..f676e61d1f7 100644 --- a/src/include/optimizer/paths.h +++ b/src/include/optimizer/paths.h @@ -8,7 +8,7 @@ * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: paths.h,v 1.53 2001/05/20 20:28:20 tgl Exp $ + * $Id: paths.h,v 1.54 2001/06/05 17:13:51 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -47,8 +47,7 @@ extern List *expand_indexqual_conditions(List *indexquals); * orindxpath.c * additional routines for indexable OR clauses */ -extern void create_or_index_paths(Query *root, RelOptInfo *rel, - List *clauses); +extern void create_or_index_paths(Query *root, RelOptInfo *rel); /* * tidpath.h |