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| author | Bruce Momjian <bruce@momjian.us> | 2002-03-08 04:29:01 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2002-03-08 04:29:01 +0000 |
| commit | ee81126d1f39dbb77a357e1cd57c1293bd107cda (patch) | |
| tree | 138d6590deea784c7bc2ac73035e428c3b908372 /src/backend/utils/adt/selfuncs.c | |
| parent | fd6b9f04a736cecd13f5f17214ad914cf1c59866 (diff) | |
| download | postgresql-ee81126d1f39dbb77a357e1cd57c1293bd107cda.tar.gz postgresql-ee81126d1f39dbb77a357e1cd57c1293bd107cda.zip | |
TODO item done:
* Change FIXED_CHAR_SEL to 0.20 from 0.04 to give better selectivity (Bruce)
Diffstat (limited to 'src/backend/utils/adt/selfuncs.c')
| -rw-r--r-- | src/backend/utils/adt/selfuncs.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/backend/utils/adt/selfuncs.c b/src/backend/utils/adt/selfuncs.c index a6f9bf6b60d..f5fb2adf2eb 100644 --- a/src/backend/utils/adt/selfuncs.c +++ b/src/backend/utils/adt/selfuncs.c @@ -15,7 +15,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/utils/adt/selfuncs.c,v 1.105 2002/03/02 21:39:32 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/utils/adt/selfuncs.c,v 1.106 2002/03/08 04:29:01 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -2964,7 +2964,7 @@ prefix_selectivity(Query *root, Var *var, char *prefix) * wildcards (such as % for LIKE or .* for regex) increase it. */ -#define FIXED_CHAR_SEL 0.04 /* about 1/25 */ +#define FIXED_CHAR_SEL 0.20 /* about 1/5 */ #define CHAR_RANGE_SEL 0.25 #define ANY_CHAR_SEL 0.9 /* not 1, since it won't match * end-of-string */ |