Re: SOUNDEX call

> Il giorno 08/feb/2012, alle ore 11:25, Marti Raudsepp <marti(at)juffo(dot)org> ha scritto:
>
>> On Wed, Feb 8, 2012 at 01:17, 84.le0n <84(dot)le0n(at)gmail(dot)com> wrote:
>>>> This is a bit ugly, but you could write the function yourself in the
>>>> PL/pgSQL procedural language, which is enabled by default in Postgres
>>>> 9.0+. Of course this would be slower.
>>>
>>> You answered yourself, this would be slower, I'll not do this.
>>
>> How are you actually using soundex() in queries? If you just call it
>> once or twice with short keywords, it probably won't make a noticeable
>> difference. And you would gain a lot in compatibility (it will take
>> ages for hosting providers to upgrade to 9.3).
>>
>> If you have queries like
>> WHERE soundex(somecolumn)=soundex('foobar')
>> then creating an index over (soundex(somecolumn)) would remove most of
>> the function overhead.

Yes, that queries are similar to your example, I need to use SOUNDEX inside WHERE clause and in INSERT INTO query.
Surely I'll add an index on that column, but I haven't SOUNDEX call.

>> You can provide the PL/pgSQL function by default as a fallback, and if
>> it turns out to be too slow for some users, you can tell them to
>> enable the fuzzystrmatch extension optionally. Make it work first,
>> then make it fast.

This is an interesting solution, but I know a little bit PL/pgSQL and I don't know how provide SOUNDEX version in PL/pgSQL, I don't know SOUNDEX algo too.
How can I provide soundex in
PL/pgSQL ?

>>
>>>>> Can I hope on SOUNDEX inclusion inside core for next release, as is
>>>>> for other major databases ?
>>>>
>>>> Unfortunately the chances are pretty slim, the last CommitFest for
>>>> PostgreSQL 9.2 closed mid-January.
>>>
>>> When will be next?
>>
>> Don't count on this. 9.3 will be released no earlier than 2013 June.
>> And it's not certain that making it a core function will be accepted
>> either.

I think I'll follow your help.

Regards,
Eng. Gabriele Pongelli

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