On 5/17/2013 9:10 PM, Atri Sharma wrote:
On Sat, May 18, 2013 at 9:27 AM, Liming Hu <dawnin...@gmail.com> wrote:
On 5/17/2013 12:39 PM, Liming Hu wrote:
On Fri, May 17, 2013 at 12:06 PM, Josh Berkus <j...@agliodbs.com> wrote:
Can we add Levenshtein-Damerau edit distance since it is used in
spelling checker
instead of levenshtein edit distance?
Patches welcome!  You, too, can be a PostgreSQL contributor.

However, you will need to preserve the ability of users to use the old
levenshtien algorithm as well, for backwards-compatibility.  Shouldn't
be hard, just add a new function called levenshtiend().

I am working on it, I will make it this weekend project.

I have done that. and put the code at github:
https://github.com/liminghu/fuzzystrmatch

liming@liming-UX31A:~/Downloads/postgresql-9.1.9/contrib/fuzzystrmatch$
sudo cp fuzzystrmatch.so
/usr/lib/postgresql/9.1/lib/fuzzystrmatch.so
liming@liming-UX31A:~/Downloads/postgresql-9.1.9/contrib/fuzzystrmatch$
sudo /etc/init.d/postgresql restart

  * Restarting PostgreSQL 9.1 database server

    [ OK ]


select dameraulevenshteinnocompatible('cta', 'cat',1,1,1,1);
CREATE EXTENSION fuzzystrmatch;

********** Error **********

ERROR: could not load library
"/usr/lib/postgresql/9.1/lib/fuzzystrmatch.so":
/usr/lib/postgresql/9.1/lib/fuzzystrmatch.so: undefined symbol:
damerau_levenshtein_internal_noncompatible

Any one can help me on this? Thanks.

The system is not able to find the required library, and I dont think
using cp to place the library is a very good idea.Did you run Make
Install after you added your work in the Makefile?

I did not run make install. I am running a stable postgresql in my laptop, I do not want to reinstall everything, just want to try this contribution. I am afraid reinstall it will destroy my configurations, and databases, just do not want to mess up.
did you see any thing wrong:
https://github.com/liminghu/fuzzystrmatch/blob/master/fuzzystrmatch--1.0.sql
https://github.com/liminghu/fuzzystrmatch/blob/master/fuzzystrmatch--unpackaged--1.0.sql
https://github.com/liminghu/fuzzystrmatch/blob/master/fuzzystrmatch.c
https://github.com/liminghu/fuzzystrmatch/blob/master/dameraulevenshtein.c
https://github.com/liminghu/fuzzystrmatch/blob/master/levenshtein.c

Thanks,

Liming


Regards,

Atri


--
Regards,

Atri
l'apprenant



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