postgres

Commit Graph

Author	SHA1	Message	Date
Neil Conway	1ac9f0e9f7	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.	21 years ago
Bruce Momjian	2daed8c5b3	Update copyrights that were missed.	21 years ago
Bruce Momjian	da9a8649d8	Update copyright to 2004.	22 years ago
Tom Lane	2f9c859ea1	Fix some copyright notices that weren't updated. Improve copyright tool so it won't miss 'em again.	23 years ago
Bruce Momjian	7b1f6ffaab	Jim C. Nasby wrote: > Second argument to metaphone is suposed to set the limit on the > number of characters to return, but it breaks on some phrases: > > usps=# select metaphone(a,3),metaphone(a,4),metaphone(a,20) from > (select 'Hello world'::varchar AS a) a; > HLW \| HLWR \| HLWRLT > > usps=# select metaphone(a,3),metaphone(a,4),metaphone(a,20) from > (select 'A A COMEAUX MEMORIAL'::varchar AS a) a; > AKM \| AKMKS \| AKMKSMMRL > > In every case I've found that does this, the 4th and 5th letters are > always 'KS'. Nice catch. There was a bug in the original metaphone algorithm from CPAN. Patch attached (while I was at it I updated my email address, changed the copyright to PGDG, and removed an unnecessary palloc). Here's how it looks now: regression=# select metaphone(a,4) from (select 'A A COMEAUX MEMORIAL'::varchar AS a) a; metaphone ----------- AKMK (1 row) regression=# select metaphone(a,5) from (select 'A A COMEAUX MEMORIAL'::varchar AS a) a; metaphone ----------- AKMKS (1 row) Joe Conway	23 years ago
Tom Lane	52c9d25933	Be careful to include postgres.h before any system headers, to ensure that the right flavors of largefile-related definitions are seen. Most of these changes are probably unnecessary, but better safe than sorry.	24 years ago
Tom Lane	ee051baeac	Make sure that all <ctype.h> routines are called with unsigned char values; it's not portable to call them with signed chars. I recall doing this for the last release, but a few more uncasted calls have snuck in.	24 years ago
Bruce Momjian	ea08e6cd55	New pgindent run with fixes suggested by Tom. Patch manually reviewed, initdb/regression tests pass.	24 years ago
Bruce Momjian	b81844b173	pgindent run on all C files. Java run to follow. initdb/regression tests pass.	25 years ago
Bruce Momjian	cdd02cdf00	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	25 years ago
Bruce Momjian	d8783c512e	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	25 years ago

11 Commits (15516c5f0b8c8209e23f36aa6e204e21bea19e6c)