/usr/share/postgresql/9.1/extension/fuzzystrmatch--unpackaged--1.0.sql is in postgresql-contrib-9.1 9.1.3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | /* contrib/fuzzystrmatch/fuzzystrmatch--unpackaged--1.0.sql */
-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION fuzzystrmatch" to load this file. \quit
ALTER EXTENSION fuzzystrmatch ADD function levenshtein(text,text);
ALTER EXTENSION fuzzystrmatch ADD function levenshtein(text,text,integer,integer,integer);
ALTER EXTENSION fuzzystrmatch ADD function metaphone(text,integer);
ALTER EXTENSION fuzzystrmatch ADD function soundex(text);
ALTER EXTENSION fuzzystrmatch ADD function text_soundex(text);
ALTER EXTENSION fuzzystrmatch ADD function difference(text,text);
ALTER EXTENSION fuzzystrmatch ADD function dmetaphone(text);
ALTER EXTENSION fuzzystrmatch ADD function dmetaphone_alt(text);
-- these functions were not in 9.0
CREATE FUNCTION levenshtein_less_equal (text,text,int) RETURNS int
AS 'MODULE_PATHNAME','levenshtein_less_equal'
LANGUAGE C IMMUTABLE STRICT;
CREATE FUNCTION levenshtein_less_equal (text,text,int,int,int,int) RETURNS int
AS 'MODULE_PATHNAME','levenshtein_less_equal_with_costs'
LANGUAGE C IMMUTABLE STRICT;
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