| From: | Jeff Janes <jeff(dot)janes(at)gmail(dot)com> |
|---|---|
| To: | Yavuz Selim Sertoğlu (ETIYA) <yavuz(dot)sertoglu(at)etiya(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "pgsql-performance(at)lists(dot)postgresql(dot)org" <pgsql-performance(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Query slows when used with view |
| Date: | 2019-10-09 15:24:00 |
| Message-ID: | CAMkU=1xgK1pWKFssxOW8unAhvJdA6ub_xcFcCNzUdBGGQKOEYA@mail.gmail.com |
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| Lists: | pgsql-performance |
On Wed, Oct 9, 2019 at 10:56 AM Yavuz Selim Sertoğlu (ETIYA) <
yavuz(dot)sertoglu(at)etiya(dot)com> wrote:
> Thanks for the reply Tom,
>
> Sorry, I couldn't understand. I just copied inside of view and add
> conditions from query that runs with view.
> The comma parts are the same in two queries, one is inside of view the
> other is in the query.
>
When you join to a view, the view sticks together, as if they were all in
parentheses. But when you substitute the text of a view into another
query, then they are all on the same level and can be parsed differently.
Consider the difference between "1+1 * 3", and "(1+1) * 3"
Cheers,
Jeff
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