Re: gin index postgres 9.2

From: "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>
To: Lucas Possamai <drum(dot)lucas(at)gmail(dot)com>
Cc: Postgres General <pgsql-general(at)postgresql(dot)org>
Subject: Re: gin index postgres 9.2
Date: 2016-05-25 23:29:26
Message-ID: CAKFQuwari142yDabQrLG2zSb+OCZU7yTD8g=QOkefPpkiEz8KQ@mail.gmail.com
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On Wed, May 25, 2016 at 6:34 PM, Lucas Possamai <drum(dot)lucas(at)gmail(dot)com>
wrote:

> I've got the following query:
>
> SELECT COUNT(DISTINCT j0_.id) AS sclr0FROM ja_customers j0_WHERE ((LOWER(j0_.name_first) LIKE '%asd%'
> OR LOWER(j0_.name_last) LIKE '%asd%'
> OR LOWER(j0_.company) LIKE '%asd%'
> OR LOWER(j0_.phone) LIKE '%asd%'
> OR LOWER(j0_.mobile) LIKE '%asd%')
> AND j0_.deleted = 'f'
> AND j0_.clientid = 2565)
> AND j0_.clientid = 2565
>
> It returns: 3
>
> I created a GIN index;
>
> CREATE INDEX CONCURRENTLY ON public.ja_customers USING gin (name_first gin_trgm_ops, name_last gin_trgm_ops, company gin_trgm_ops, phone gin_trgm_ops, mobile gin_trgm_ops);
>
> New query to hit the new index:
>
> SELECT COUNT(DISTINCT j0_.id) AS sclr0FROM ja_customers j0_WHERE j0_.name_first LIKE '%asd%'
> OR j0_.name_last LIKE '%asd%'
> OR j0_.company LIKE '%asd%'
> OR j0_.phone LIKE '%asd%'
> OR j0_.mobile LIKE '%asd%'
> AND j0_.deleted = 'f'
> AND j0_.clientid = 2565
> AND j0_.clientid = 2565
>
> It returns: 532
>
>
> The problem is that the new query returns different results...
>
> Please, what am I missing guys?
>
​Parentheses?

David J.

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