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Add KNNGIST support to contrib/pg_trgm.

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Teodor Sigaev, with some revision by Tom
This commit is contained in:
Tom Lane
2010-12-04 00:16:21 -05:00
parent b576757d7e
commit b525bf771e
9 changed files with 214 additions and 43 deletions
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26
contrib/pg_trgm/trgm_op.c
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@ -1,11 +1,16 @@
/*
* contrib/pg_trgm/trgm_op.c
*/
#include "trgm.h"
#include "postgres.h"
#include <ctype.h>
#include "utils/array.h"
#include "trgm.h"
#include "catalog/pg_type.h"
#include "tsearch/ts_locale.h"
#include "utils/array.h"
PG_MODULE_MAGIC;
@ -359,16 +364,25 @@ similarity(PG_FUNCTION_ARGS)
PG_RETURN_FLOAT4(res);
}
PG_FUNCTION_INFO_V1(similarity_dist);
Datum similarity_dist(PG_FUNCTION_ARGS);
Datum
similarity_dist(PG_FUNCTION_ARGS)
{
float4 res = DatumGetFloat4(DirectFunctionCall2(similarity,
PG_GETARG_DATUM(0),
PG_GETARG_DATUM(1)));
PG_RETURN_FLOAT4(1.0 - res);
}
PG_FUNCTION_INFO_V1(similarity_op);
Datum similarity_op(PG_FUNCTION_ARGS);
Datum
similarity_op(PG_FUNCTION_ARGS)
{
float4 res = DatumGetFloat4(DirectFunctionCall2(
similarity,
float4 res = DatumGetFloat4(DirectFunctionCall2(similarity,
PG_GETARG_DATUM(0),
PG_GETARG_DATUM(1)
));
PG_GETARG_DATUM(1)));
PG_RETURN_BOOL(res >= trgm_limit);
}