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postgresql/contrib/fuzzystrmatch/fuzzystrmatch--1.0.sql

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Convert contrib modules to use the extension facility. This isn't fully tested as yet, in particular I'm not sure that the "foo--unpackaged--1.0.sql" scripts are OK. But it's time to get some buildfarm cycles on it. sepgsql is not converted to an extension, mainly because it seems to require a very nonstandard installation process. Dimitri Fontaine and Tom Lane
2011-02-14 09:06:41 +08:00
/* contrib/fuzzystrmatch/fuzzystrmatch--1.0.sql */
Per this discussion, here's a patch to implement both levenshtein() and metaphone() in a contrib. There seem to be a fair number of different approaches to both of these algorithms. I used the simplest case for levenshtein which has a cost of 1 for any character insertion, deletion, or substitution. For metaphone, I adapted the same code from CPAN that the PHP folks did. A couple of questions: 1. Does it make sense to fold the soundex contrib together with this one? 2. I was debating trying to add multibyte support to levenshtein (it would make no sense at all for metaphone), but a quick search through the contrib directory found no hits on the word MULTIBYTE. Should worry about adding multibyte support to levenshtein()? Joe Conway
2001-08-08 00:47:43 +08:00
Throw a useful error message if an extension script file is fed to psql. We have seen one too many reports of people trying to use 9.1 extension files in the old-fashioned way of sourcing them in psql. Not only does that usually not work (due to failure to substitute for MODULE_PATHNAME and/or @extschema@), but if it did work they'd get a collection of loose objects not an extension. To prevent this, insert an \echo ... \quit line that prints a suitable error message into each extension script file, and teach commands/extension.c to ignore lines starting with \echo. That should not only prevent any adverse consequences of loading a script file the wrong way, but make it crystal clear to users that they need to do it differently now. Tom Lane, following an idea of Andrew Dunstan's. Back-patch into 9.1 ... there is not going to be much value in this if we wait till 9.2.
2011-10-13 03:45:03 +08:00
-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION fuzzystrmatch" to load this file. \quit
Avoid use of CREATE OR REPLACE FUNCTION in extension installation files. It was never terribly consistent to use OR REPLACE (because of the lack of comparable functionality for data types, operators, etc), and experimentation shows that it's now positively pernicious in the extension world. We really want a failure to occur if there are any conflicts, else it's unclear what the extension-ownership state of the conflicted object ought to be. Most of the time, CREATE EXTENSION will fail anyway because of conflicts on other object types, but an extension defining only functions can succeed, with bad results.
2011-02-14 10:24:14 +08:00
CREATE FUNCTION levenshtein (text,text) RETURNS int
Update /contrib for "autocommit TO 'on'". Create objects in public schema. Make spacing/capitalization consistent. Remove transaction block use for object creation. Remove unneeded function GRANTs.
2002-10-19 02:41:22 +08:00
AS 'MODULE_PATHNAME','levenshtein'
The attached patch implements the soundex difference function which compares two strings' soundex values for similarity, from Kris Jurka. Also mark the text_soundex() function as STRICT, to avoid crashing on NULL input.
2005-01-26 16:04:04 +08:00
LANGUAGE C IMMUTABLE STRICT;
Update /contrib for "autocommit TO 'on'". Create objects in public schema. Make spacing/capitalization consistent. Remove transaction block use for object creation. Remove unneeded function GRANTs.
2002-10-19 02:41:22 +08:00
Avoid use of CREATE OR REPLACE FUNCTION in extension installation files. It was never terribly consistent to use OR REPLACE (because of the lack of comparable functionality for data types, operators, etc), and experimentation shows that it's now positively pernicious in the extension world. We really want a failure to occur if there are any conflicts, else it's unclear what the extension-ownership state of the conflicted object ought to be. Most of the time, CREATE EXTENSION will fail anyway because of conflicts on other object types, but an extension defining only functions can succeed, with bad results.
2011-02-14 10:24:14 +08:00
CREATE FUNCTION levenshtein (text,text,int,int,int) RETURNS int
Add a variant of the Levenshtein string-distance function that lets the user specify the cost values to use, instead of always using 1's. Volkan Yazici In passing, remove fuzzystrmatch.h, which contained a bunch of stuff that had no business being in a .h file; fold it into its only user, fuzzystrmatch.c.
2008-04-04 05:13:07 +08:00
AS 'MODULE_PATHNAME','levenshtein_with_costs'
LANGUAGE C IMMUTABLE STRICT;
Avoid use of CREATE OR REPLACE FUNCTION in extension installation files. It was never terribly consistent to use OR REPLACE (because of the lack of comparable functionality for data types, operators, etc), and experimentation shows that it's now positively pernicious in the extension world. We really want a failure to occur if there are any conflicts, else it's unclear what the extension-ownership state of the conflicted object ought to be. Most of the time, CREATE EXTENSION will fail anyway because of conflicts on other object types, but an extension defining only functions can succeed, with bad results.
2011-02-14 10:24:14 +08:00
CREATE FUNCTION levenshtein_less_equal (text,text,int) RETURNS int
Add levenshtein_less_equal, optimized version for small distances. Alexander Korotkov, heavily revised by me.
2010-10-19 21:51:06 +08:00
AS 'MODULE_PATHNAME','levenshtein_less_equal'
LANGUAGE C IMMUTABLE STRICT;
Avoid use of CREATE OR REPLACE FUNCTION in extension installation files. It was never terribly consistent to use OR REPLACE (because of the lack of comparable functionality for data types, operators, etc), and experimentation shows that it's now positively pernicious in the extension world. We really want a failure to occur if there are any conflicts, else it's unclear what the extension-ownership state of the conflicted object ought to be. Most of the time, CREATE EXTENSION will fail anyway because of conflicts on other object types, but an extension defining only functions can succeed, with bad results.
2011-02-14 10:24:14 +08:00
CREATE FUNCTION levenshtein_less_equal (text,text,int,int,int,int) RETURNS int
Add levenshtein_less_equal, optimized version for small distances. Alexander Korotkov, heavily revised by me.
2010-10-19 21:51:06 +08:00
AS 'MODULE_PATHNAME','levenshtein_less_equal_with_costs'
LANGUAGE C IMMUTABLE STRICT;
Avoid use of CREATE OR REPLACE FUNCTION in extension installation files. It was never terribly consistent to use OR REPLACE (because of the lack of comparable functionality for data types, operators, etc), and experimentation shows that it's now positively pernicious in the extension world. We really want a failure to occur if there are any conflicts, else it's unclear what the extension-ownership state of the conflicted object ought to be. Most of the time, CREATE EXTENSION will fail anyway because of conflicts on other object types, but an extension defining only functions can succeed, with bad results.
2011-02-14 10:24:14 +08:00
CREATE FUNCTION metaphone (text,int) RETURNS text
Update /contrib for "autocommit TO 'on'". Create objects in public schema. Make spacing/capitalization consistent. Remove transaction block use for object creation. Remove unneeded function GRANTs.
2002-10-19 02:41:22 +08:00
AS 'MODULE_PATHNAME','metaphone'
The attached patch implements the soundex difference function which compares two strings' soundex values for similarity, from Kris Jurka. Also mark the text_soundex() function as STRICT, to avoid crashing on NULL input.
2005-01-26 16:04:04 +08:00
LANGUAGE C IMMUTABLE STRICT;
Sorry - I should have gotten to this sooner. Here's a patch which you should be able to apply against what you just committed. It rolls soundex into fuzzystrmatch. Remove soundex/metaphone and merge into fuzzystrmatch. Joe Conway
2001-08-08 02:16:01 +08:00
Avoid use of CREATE OR REPLACE FUNCTION in extension installation files. It was never terribly consistent to use OR REPLACE (because of the lack of comparable functionality for data types, operators, etc), and experimentation shows that it's now positively pernicious in the extension world. We really want a failure to occur if there are any conflicts, else it's unclear what the extension-ownership state of the conflicted object ought to be. Most of the time, CREATE EXTENSION will fail anyway because of conflicts on other object types, but an extension defining only functions can succeed, with bad results.
2011-02-14 10:24:14 +08:00
CREATE FUNCTION soundex(text) RETURNS text
Update /contrib for "autocommit TO 'on'". Create objects in public schema. Make spacing/capitalization consistent. Remove transaction block use for object creation. Remove unneeded function GRANTs.
2002-10-19 02:41:22 +08:00
AS 'MODULE_PATHNAME', 'soundex'
The attached patch implements the soundex difference function which compares two strings' soundex values for similarity, from Kris Jurka. Also mark the text_soundex() function as STRICT, to avoid crashing on NULL input.
2005-01-26 16:04:04 +08:00
LANGUAGE C IMMUTABLE STRICT;
Sorry - I should have gotten to this sooner. Here's a patch which you should be able to apply against what you just committed. It rolls soundex into fuzzystrmatch. Remove soundex/metaphone and merge into fuzzystrmatch. Joe Conway
2001-08-08 02:16:01 +08:00
Avoid use of CREATE OR REPLACE FUNCTION in extension installation files. It was never terribly consistent to use OR REPLACE (because of the lack of comparable functionality for data types, operators, etc), and experimentation shows that it's now positively pernicious in the extension world. We really want a failure to occur if there are any conflicts, else it's unclear what the extension-ownership state of the conflicted object ought to be. Most of the time, CREATE EXTENSION will fail anyway because of conflicts on other object types, but an extension defining only functions can succeed, with bad results.
2011-02-14 10:24:14 +08:00
CREATE FUNCTION text_soundex(text) RETURNS text
Update /contrib for "autocommit TO 'on'". Create objects in public schema. Make spacing/capitalization consistent. Remove transaction block use for object creation. Remove unneeded function GRANTs.
2002-10-19 02:41:22 +08:00
AS 'MODULE_PATHNAME', 'soundex'
The attached patch implements the soundex difference function which compares two strings' soundex values for similarity, from Kris Jurka. Also mark the text_soundex() function as STRICT, to avoid crashing on NULL input.
2005-01-26 16:04:04 +08:00
LANGUAGE C IMMUTABLE STRICT;
Avoid use of CREATE OR REPLACE FUNCTION in extension installation files. It was never terribly consistent to use OR REPLACE (because of the lack of comparable functionality for data types, operators, etc), and experimentation shows that it's now positively pernicious in the extension world. We really want a failure to occur if there are any conflicts, else it's unclear what the extension-ownership state of the conflicted object ought to be. Most of the time, CREATE EXTENSION will fail anyway because of conflicts on other object types, but an extension defining only functions can succeed, with bad results.
2011-02-14 10:24:14 +08:00
CREATE FUNCTION difference(text,text) RETURNS int
The attached patch implements the soundex difference function which compares two strings' soundex values for similarity, from Kris Jurka. Also mark the text_soundex() function as STRICT, to avoid crashing on NULL input.
2005-01-26 16:04:04 +08:00
AS 'MODULE_PATHNAME', 'difference'
LANGUAGE C IMMUTABLE STRICT;
Add double metaphone code from Andrew Dunstan. Also change metaphone so that an empty input string causes an empty output string to be returned, instead of throwing an ERROR -- per complaint from Aaron Hillegass, and consistent with double metaphone. Fix examples in README.soundex pointed out by James Robinson.
2004-07-01 11:25:48 +08:00
Avoid use of CREATE OR REPLACE FUNCTION in extension installation files. It was never terribly consistent to use OR REPLACE (because of the lack of comparable functionality for data types, operators, etc), and experimentation shows that it's now positively pernicious in the extension world. We really want a failure to occur if there are any conflicts, else it's unclear what the extension-ownership state of the conflicted object ought to be. Most of the time, CREATE EXTENSION will fail anyway because of conflicts on other object types, but an extension defining only functions can succeed, with bad results.
2011-02-14 10:24:14 +08:00
CREATE FUNCTION dmetaphone (text) RETURNS text
The attached patch implements the soundex difference function which compares two strings' soundex values for similarity, from Kris Jurka. Also mark the text_soundex() function as STRICT, to avoid crashing on NULL input.
2005-01-26 16:04:04 +08:00
AS 'MODULE_PATHNAME', 'dmetaphone'
LANGUAGE C IMMUTABLE STRICT;
Add double metaphone code from Andrew Dunstan. Also change metaphone so that an empty input string causes an empty output string to be returned, instead of throwing an ERROR -- per complaint from Aaron Hillegass, and consistent with double metaphone. Fix examples in README.soundex pointed out by James Robinson.
2004-07-01 11:25:48 +08:00
Avoid use of CREATE OR REPLACE FUNCTION in extension installation files. It was never terribly consistent to use OR REPLACE (because of the lack of comparable functionality for data types, operators, etc), and experimentation shows that it's now positively pernicious in the extension world. We really want a failure to occur if there are any conflicts, else it's unclear what the extension-ownership state of the conflicted object ought to be. Most of the time, CREATE EXTENSION will fail anyway because of conflicts on other object types, but an extension defining only functions can succeed, with bad results.
2011-02-14 10:24:14 +08:00
CREATE FUNCTION dmetaphone_alt (text) RETURNS text
The attached patch implements the soundex difference function which compares two strings' soundex values for similarity, from Kris Jurka. Also mark the text_soundex() function as STRICT, to avoid crashing on NULL input.
2005-01-26 16:04:04 +08:00
AS 'MODULE_PATHNAME', 'dmetaphone_alt'
LANGUAGE C IMMUTABLE STRICT;
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