58 lines
1.4 KiB
SQL
58 lines
1.4 KiB
SQL
--------------- soundex.sql:
|
|
|
|
CREATE FUNCTION text_soundex(text) RETURNS text
|
|
AS '/usr/local/postgres/postgres95/src/funcs/soundex.so' LANGUAGE 'c';
|
|
|
|
SELECT text_soundex('hello world!');
|
|
|
|
CREATE TABLE s (nm text)\g
|
|
|
|
insert into s values ('john')\g
|
|
insert into s values ('joan')\g
|
|
insert into s values ('wobbly')\g
|
|
|
|
select * from s
|
|
where text_soundex(nm) = text_soundex('john')\g
|
|
|
|
select nm from s a, s b
|
|
where text_soundex(a.nm) = text_soundex(b.nm)
|
|
and a.oid <> b.oid\g
|
|
|
|
CREATE FUNCTION text_sx_eq(text, text) RETURNS bool AS
|
|
'select text_soundex($1) = text_soundex($2)'
|
|
LANGUAGE 'sql'\g
|
|
|
|
CREATE FUNCTION text_sx_lt(text,text) RETURNS bool AS
|
|
'select text_soundex($1) < text_soundex($2)'
|
|
LANGUAGE 'sql'\g
|
|
|
|
CREATE FUNCTION text_sx_gt(text,text) RETURNS bool AS
|
|
'select text_soundex($1) > text_soundex($2)'
|
|
LANGUAGE 'sql';
|
|
|
|
CREATE FUNCTION text_sx_le(text,text) RETURNS bool AS
|
|
'select text_soundex($1) <= text_soundex($2)'
|
|
LANGUAGE 'sql';
|
|
|
|
CREATE FUNCTION text_sx_ge(text,text) RETURNS bool AS
|
|
'select text_soundex($1) >= text_soundex($2)'
|
|
LANGUAGE 'sql';
|
|
|
|
CREATE FUNCTION text_sx_ne(text,text) RETURNS bool AS
|
|
'select text_soundex($1) <> text_soundex($2)'
|
|
LANGUAGE 'sql';
|
|
|
|
DROP OPERATOR #= (text,text)\g
|
|
|
|
CREATE OPERATOR #= (leftarg=text, rightarg=text, procedure=text_sx_eq,
|
|
commutator=text_sx_eq)\g
|
|
|
|
SELECT *
|
|
FROM s
|
|
WHERE text_sx_eq(nm,'john')\g
|
|
|
|
SELECT *
|
|
from s
|
|
where s.nm #= 'john';
|
|
|