Re: tsvector_update_trigger performance?

Hi,

Le 24 juin 09 à 18:29, Alvaro Herrera a écrit :
> Oleg Bartunov wrote:
>> On Wed, 24 Jun 2009, Chris St Denis wrote:
>>
>>> Is tsvector_update_trigger() smart enough to not bother updating a
>>> tsvector if the text in that column has not changed?
>>
>> no, you should do check yourself. There are several examples in
>> mailing lists.
>
> Or you could try using the supress_redundant_updates_trigger()
> function
> that has been included in 8.4 (should be easy to backport)

   http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/backports/min_update/
   http://blog.tapoueh.org/projects.html#sec9

But it won't handle the case where some other random column has
changed, but the UPDATE is not affecting the text indexed...
--
dim