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around. I tested this patch under Cygwin and Linux. Note that I only changed dblink's Makefile in the most minimal way to fix the link problem under Cygwin (i.e., use the link rule from Makefile.shlib instead). dblink's Makefile should probably be further patched to be consistent with the other PostgreSQL Makefiles. Jason Tishler |
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Makefile | ||
metaphone.c | ||
metaphone.sql.in | ||
README.metaphone |
This directory contains a module that implements the "Metaphone" code as a PostgreSQL user-defined function. The Metaphone system is a method of matching similar sounding names (or any words) to the same code. Metaphone was invented by Lawrence Philips as an improvement to the popular name-hashing routine, Soundex. This metaphone code is from Michael Kuhn, and is detailed at http://aspell.sourceforge.net/metaphone/metaphone-kuhn.txt Code for this (including this help file!) was liberally borrowed from the soundex() module for PostgreSQL. There are two functions: metaphone(text) : returns hash of a name metaphone(text,int) : returns hash (maximum length of int) of name --- To install it, first configure the main source tree, then run make; make install in this directory. Finally, load the function definition with psql: psql -f PREFIX/share/contrib/metaphone.sql The following are some usage examples: SELECT text_metaphone('hello world!'); SELECT text_metaphone('hello world!', 4); 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_metaphone(nm) = text_metaphone('john')\g select nm from s a, s b where text_metaphone(a.nm) = text_metaphone(b.nm) and a.oid <> b.oid\g CREATE FUNCTION text_mp_eq(text, text) RETURNS bool AS 'select text_metaphone($1) = text_metaphone($2)' LANGUAGE 'sql'\g CREATE FUNCTION text_mp_lt(text,text) RETURNS bool AS 'select text_metaphone($1) < text_metaphone($2)' LANGUAGE 'sql'\g CREATE FUNCTION text_mp_gt(text,text) RETURNS bool AS 'select text_metaphone($1) > text_metaphone($2)' LANGUAGE 'sql'; CREATE FUNCTION text_mp_le(text,text) RETURNS bool AS 'select text_metaphone($1) <= text_metaphone($2)' LANGUAGE 'sql'; CREATE FUNCTION text_mp_ge(text,text) RETURNS bool AS 'select text_metaphone($1) >= text_metaphone($2)' LANGUAGE 'sql'; CREATE FUNCTION text_mp_ne(text,text) RETURNS bool AS 'select text_metaphone($1) <> text_metaphone($2)' LANGUAGE 'sql'; DROP OPERATOR #= (text,text)\g CREATE OPERATOR #= (leftarg=text, rightarg=text, procedure=text_mp_eq, commutator=text_mp_eq)\g SELECT * FROM s WHERE text_mp_eq(nm,'pillsbury')\g SELECT * from s where s.nm #= 'pillsbury';