mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-15 08:20:16 +08:00
cbfa4092bb
-------------------------------------- The pg_trgm contrib module provides functions and index classes for determining the similarity of text based on trigram matching.
108 lines
2.4 KiB
MySQL
108 lines
2.4 KiB
MySQL
SET search_path = public;
|
|
|
|
BEGIN;
|
|
|
|
create function set_limit(float4)
|
|
returns float4
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C' with (isstrict,iscachable);
|
|
|
|
create function show_limit()
|
|
returns float4
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C' with (isstrict,iscachable);
|
|
|
|
create function show_trgm(text)
|
|
returns _text
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C' with (isstrict,iscachable);
|
|
|
|
create function similarity(text,text)
|
|
returns float4
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C' with (isstrict,iscachable);
|
|
|
|
create function similarity_op(text,text)
|
|
returns bool
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C' with (isstrict,iscachable);
|
|
|
|
CREATE OPERATOR % (
|
|
LEFTARG = text,
|
|
RIGHTARG = text,
|
|
PROCEDURE = similarity_op,
|
|
COMMUTATOR = '%',
|
|
RESTRICT = contsel,
|
|
JOIN = contjoinsel
|
|
);
|
|
|
|
--gist key
|
|
CREATE FUNCTION gtrgm_in(cstring)
|
|
RETURNS gtrgm
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C' with (isstrict);
|
|
|
|
CREATE FUNCTION gtrgm_out(gtrgm)
|
|
RETURNS cstring
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C' with (isstrict);
|
|
|
|
CREATE TYPE gtrgm (
|
|
INTERNALLENGTH = -1,
|
|
INPUT = gtrgm_in,
|
|
OUTPUT = gtrgm_out
|
|
);
|
|
|
|
-- support functions
|
|
CREATE FUNCTION gtrgm_consistent(gtrgm,internal,int4)
|
|
RETURNS bool
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C';
|
|
|
|
CREATE FUNCTION gtrgm_compress(internal)
|
|
RETURNS internal
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C';
|
|
|
|
CREATE FUNCTION gtrgm_decompress(internal)
|
|
RETURNS internal
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C';
|
|
|
|
CREATE FUNCTION gtrgm_penalty(internal,internal,internal)
|
|
RETURNS internal
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C' with (isstrict);
|
|
|
|
CREATE FUNCTION gtrgm_picksplit(internal, internal)
|
|
RETURNS internal
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C';
|
|
|
|
CREATE FUNCTION gtrgm_union(bytea, internal)
|
|
RETURNS _int4
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C';
|
|
|
|
CREATE FUNCTION gtrgm_same(gtrgm, gtrgm, internal)
|
|
RETURNS internal
|
|
AS 'MODULE_PATHNAME'
|
|
LANGUAGE 'C';
|
|
|
|
-- create the operator class
|
|
CREATE OPERATOR CLASS gist_trgm_ops
|
|
FOR TYPE text USING gist
|
|
AS
|
|
OPERATOR 1 % (text, text),
|
|
FUNCTION 1 gtrgm_consistent (gtrgm, internal, int4),
|
|
FUNCTION 2 gtrgm_union (bytea, internal),
|
|
FUNCTION 3 gtrgm_compress (internal),
|
|
FUNCTION 4 gtrgm_decompress (internal),
|
|
FUNCTION 5 gtrgm_penalty (internal, internal, internal),
|
|
FUNCTION 6 gtrgm_picksplit (internal, internal),
|
|
FUNCTION 7 gtrgm_same (gtrgm, gtrgm, internal),
|
|
STORAGE gtrgm;
|
|
|
|
|
|
COMMIT;
|