From: | Peter Geoghegan <pg(at)heroku(dot)com> |
---|---|
To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
Cc: | Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Chris Rogers <teukros(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: CTE optimization fence on the todo list? |
Date: | 2015-05-01 21:39:47 |
Message-ID: | CAM3SWZTUyxT6z1OJ_93WMz1gwr-VOjD4bYXxmrra5QY4JAHPaA@mail.gmail.com |
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Lists: | pgsql-hackers |
On Fri, May 1, 2015 at 2:36 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> On Fri, May 1, 2015 at 4:53 PM, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com> wrote:
>> ISTR a comment to the effect of the SQL standard effectively requires
>> current behavior.
>
> I'd be astonished. The SQL standard doesn't even know that there is
> such a thing as an index, so I presume it doesn't dictate the behavior
> of the query planner either.
I agree. Somehow, the idea that this is within the standard caught on,
but I'm almost certain it's false.
--
Peter Geoghegan
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