diff options
Diffstat (limited to 'src/backend/access/gin/ginarrayproc.c')
| -rw-r--r-- | src/backend/access/gin/ginarrayproc.c | 41 |
1 files changed, 34 insertions, 7 deletions
diff --git a/src/backend/access/gin/ginarrayproc.c b/src/backend/access/gin/ginarrayproc.c index c453cda525..c85399d632 100644 --- a/src/backend/access/gin/ginarrayproc.c +++ b/src/backend/access/gin/ginarrayproc.c @@ -8,7 +8,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/access/gin/ginarrayproc.c,v 1.12 2008/01/01 19:45:46 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/access/gin/ginarrayproc.c,v 1.13 2008/04/14 17:05:33 tgl Exp $ *------------------------------------------------------------------------- */ #include "postgres.h" @@ -95,8 +95,9 @@ ginarrayconsistent(PG_FUNCTION_ARGS) bool *check = (bool *) PG_GETARG_POINTER(0); StrategyNumber strategy = PG_GETARG_UINT16(1); ArrayType *query = PG_GETARG_ARRAYTYPE_P(2); - int res, - i, + bool *recheck = (bool *) PG_GETARG_POINTER(3); + bool res; + int i, nentries; /* ARRAYCHECK was already done by previous ginarrayextract call */ @@ -104,25 +105,51 @@ ginarrayconsistent(PG_FUNCTION_ARGS) switch (strategy) { case GinOverlapStrategy: + /* result is not lossy */ + *recheck = false; + /* at least one element in check[] is true, so result = true */ + res = true; + break; case GinContainedStrategy: + /* we will need recheck */ + *recheck = true; /* at least one element in check[] is true, so result = true */ - res = TRUE; + res = true; break; case GinContainsStrategy: + /* result is not lossy */ + *recheck = false; + /* must have all elements in check[] true */ + nentries = ArrayGetNItems(ARR_NDIM(query), ARR_DIMS(query)); + res = true; + for (i = 0; i < nentries; i++) + { + if (!check[i]) + { + res = false; + break; + } + } + break; case GinEqualStrategy: + /* we will need recheck */ + *recheck = true; + /* must have all elements in check[] true */ nentries = ArrayGetNItems(ARR_NDIM(query), ARR_DIMS(query)); - res = TRUE; + res = true; for (i = 0; i < nentries; i++) + { if (!check[i]) { - res = FALSE; + res = false; break; } + } break; default: elog(ERROR, "ginarrayconsistent: unknown strategy number: %d", strategy); - res = FALSE; + res = false; } PG_RETURN_BOOL(res); |