Re: 9.5: UPDATE/DELETE .. ORDER BY .. LIMIT .. - Mailing list pgsql-hackers

From Robert Haas
Subject Re: 9.5: UPDATE/DELETE .. ORDER BY .. LIMIT ..
Date
Msg-id CA+TgmoZ7dKsRhYJ6YqA2-vJXo2Kh=vjS32NVMj96u+K3TZ7wAA@mail.gmail.com
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In response to Re: 9.5: UPDATE/DELETE .. ORDER BY .. LIMIT ..  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: 9.5: UPDATE/DELETE .. ORDER BY .. LIMIT ..
List pgsql-hackers
On Sun, May 11, 2014 at 12:47 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Simon Riggs <simon@2ndQuadrant.com> writes:
>> On 11 May 2014 11:18, Andres Freund <andres@2ndquadrant.com> wrote:
>>> I don't know. I'd find UPDATE/DELETE ORDER BY something rather
>>> useful.
>
>> Perhaps if an index exists to provide an ordering that makes it clear
>> what this means, then yes.
>
> The $64 question is whether we'd accept an implementation that fails
> if the target table has children (ie, is partitioned).

I'd say "no".  Partitioning is important, and we need to make it more
seamless and better-integrated, not add new warts.

> That seems
> to me to not be up to the project's usual quality expectations, but
> maybe if there's enough demand for a partial solution we should do so.

I like this feature, but if I were searching for places where it makes
sense to loosen our project's usual quality expectations, this isn't
where I'd start.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company



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