Re: knngist - 0.8

Alexander Korotkov escreveu:
> Such approach
> can give benefit when we need to filter by similarity. For example, in
> pg_trgm "%" is used for similarity filtering, but similarity threshold
> is global for session. That's why we can't create complex queries which
> contain similarity filtering with different threshold.
>
What do you mean by complex queries? You can always use the SET command. Sadly
it doesn't work when you have different thresholds within distinct subqueries.
(In pg_similarity I use this approach to set the function's thresholds). What
I am investigating is a way to build an index with some user-defined
parameters. (We already have some infra-structure in reloptions for that but
it needs some work to support my idea). I have some half-baked patch that I'm
planning to submit to some of the CFs. Unfortunately, I don't have time for it
ATM.

--
Euler Taveira de Oliveira
http://www.timbira.com/