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| author | Teodor Sigaev <teodor@sigaev.ru> | 2007-01-31 15:09:45 +0000 |
|---|---|---|
| committer | Teodor Sigaev <teodor@sigaev.ru> | 2007-01-31 15:09:45 +0000 |
| commit | d4c6da152782b580b24cd8b4054eb1b7fb72c5a0 (patch) | |
| tree | 23db426588b5ff2a39981393a3cc4b48397b4294 /src/backend/access/gin/ginutil.c | |
| parent | 147a3ce149088c913b152e7d37bb92f61bb068dd (diff) | |
| download | postgresql-d4c6da152782b580b24cd8b4054eb1b7fb72c5a0.tar.gz postgresql-d4c6da152782b580b24cd8b4054eb1b7fb72c5a0.zip | |
Allow GIN's extractQuery method to signal that nothing can satisfy the query.
In this case extractQuery should returns -1 as nentries. This changes
prototype of extractQuery method to use int32* instead of uint32* for
nentries argument.
Based on that gincostestimate may see two corner cases: nothing will be found
or seqscan should be used.
Per proposal at http://archives.postgresql.org/pgsql-hackers/2007-01/msg01581.php
PS tsearch_core patch should be sightly modified to support changes, but I'm
waiting a verdict about reviewing of tsearch_core patch.
Diffstat (limited to 'src/backend/access/gin/ginutil.c')
| -rw-r--r-- | src/backend/access/gin/ginutil.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/backend/access/gin/ginutil.c b/src/backend/access/gin/ginutil.c index a14900e56c6..e704e8051eb 100644 --- a/src/backend/access/gin/ginutil.c +++ b/src/backend/access/gin/ginutil.c @@ -8,7 +8,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/access/gin/ginutil.c,v 1.9 2007/01/05 22:19:21 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/access/gin/ginutil.c,v 1.10 2007/01/31 15:09:45 teodor Exp $ *------------------------------------------------------------------------- */ @@ -148,7 +148,7 @@ cmpEntries(const Datum *a, const Datum *b, cmpEntriesData *arg) } Datum * -extractEntriesS(GinState *ginstate, Datum value, uint32 *nentries, +extractEntriesS(GinState *ginstate, Datum value, int32 *nentries, bool *needUnique) { Datum *entries; @@ -178,7 +178,7 @@ extractEntriesS(GinState *ginstate, Datum value, uint32 *nentries, Datum * -extractEntriesSU(GinState *ginstate, Datum value, uint32 *nentries) +extractEntriesSU(GinState *ginstate, Datum value, int32 *nentries) { bool needUnique; Datum *entries = extractEntriesS(ginstate, value, nentries, |