Re: LIKE CLAUSE on VIEWS

From: Samed YILDIRIM <samed(at)reddoc(dot)net>
To: aditya desai <admad123(at)gmail(dot)com>
Cc: Pgsql Performance <pgsql-performance(at)lists(dot)postgresql(dot)org>
Subject: Re: LIKE CLAUSE on VIEWS
Date: 2023-01-22 11:40:58
Message-ID: CAAo1mbnR5x2p8sYSs-EO=+c6JfNYZcKtDNi_+vqnCKWdnZ0YZg@mail.gmail.com
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Hi Aditya,

If you share your view's query and the query you run against the view, it
would help all of us to understand better.

pg_trgm would be the life saver option for you, of course if you created it
on the right column, with the right expression, and by using the right
indexing method. It doesn't mean you can't use any index and indexes won't
be used because it is a view, well, if you do it right.

https://www.postgresql.org/docs/current/pgtrgm.html

Best regards.
Samed YILDIRIM

On Sun, 22 Jan 2023 at 13:34, aditya desai <admad123(at)gmail(dot)com> wrote:

> Hi,
> Is there any way to improve performance of LIKE clause on VIEWS.
>
> select * From request_vw where upper(status) like '%CAPTURED%' - 28
> seconds.
>
> select * from request_vw where status='CAPTURED'
>
> Application team is reluctant to change queries from the Application side
> to = instead of LIKE.
>
> Also as this is VIEW TRIGRAM nor normal indexes don't get used.
>
>
> Regards,
> Aditya.
>

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