diff options
Diffstat (limited to 'contrib/pg_trgm/trgm_gist.c')
| -rw-r--r-- | contrib/pg_trgm/trgm_gist.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/contrib/pg_trgm/trgm_gist.c b/contrib/pg_trgm/trgm_gist.c index 7baf4fd6978..2720d7fb707 100644 --- a/contrib/pg_trgm/trgm_gist.c +++ b/contrib/pg_trgm/trgm_gist.c @@ -1,5 +1,5 @@ /* - * $PostgreSQL: pgsql/contrib/pg_trgm/trgm_gist.c,v 1.14 2008/05/17 01:28:21 adunstan Exp $ + * $PostgreSQL: pgsql/contrib/pg_trgm/trgm_gist.c,v 1.15 2008/07/11 11:56:48 teodor Exp $ */ #include "trgm.h" @@ -168,12 +168,30 @@ gtrgm_consistent(PG_FUNCTION_ARGS) /* Oid subtype = PG_GETARG_OID(3); */ bool *recheck = (bool *) PG_GETARG_POINTER(4); TRGM *key = (TRGM *) DatumGetPointer(entry->key); - TRGM *qtrg = generate_trgm(VARDATA(query), VARSIZE(query) - VARHDRSZ); + TRGM *qtrg; bool res = false; + char *cache = (char*) fcinfo->flinfo->fn_extra; /* All cases served by this function are exact */ *recheck = false; + if ( cache == NULL || VARSIZE(cache) != VARSIZE(query) || memcmp( cache, query, VARSIZE(query) ) !=0 ) + { + qtrg = generate_trgm(VARDATA(query), VARSIZE(query) - VARHDRSZ); + + if (cache) + pfree(cache); + + fcinfo->flinfo->fn_extra = MemoryContextAlloc(fcinfo->flinfo->fn_mcxt, + MAXALIGN(VARSIZE(query)) + VARSIZE(qtrg) ); + cache = (char*) fcinfo->flinfo->fn_extra; + + memcpy( cache, query, VARSIZE(query) ); + memcpy( cache + MAXALIGN(VARSIZE(query)), qtrg, VARSIZE(qtrg) ); + } + + qtrg = (TRGM*)( cache + MAXALIGN(VARSIZE(query)) ); + if (GIST_LEAF(entry)) { /* all leafs contains orig trgm */ float4 tmpsml = cnt_sml(key, qtrg); |