Re: Doubt about AccessExclusiveLock in ALTER TABLE .. SET ( .. );

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От Fabrízio de Royes Mello
Тема Re: Doubt about AccessExclusiveLock in ALTER TABLE .. SET ( .. );
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Msg-id CAFcNs+ofZa3w4RVMK1jh8MzWh3P3ag6obJVKrP0kTCGcMpgNdw@mail.gmail.com
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Ответ на Re: Doubt about AccessExclusiveLock in ALTER TABLE .. SET ( .. );  (Robert Haas <robertmhaas@gmail.com>)
Ответы Re: Doubt about AccessExclusiveLock in ALTER TABLE .. SET ( .. );  (Michael Paquier <michael.paquier@gmail.com>)
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On Wed, Aug 5, 2015 at 9:31 AM, Robert Haas <robertmhaas@gmail.com> wrote:
>
> On Tue, Aug 4, 2015 at 1:15 PM, Alvaro Herrera <alvherre@2ndquadrant.com> wrote:
> > That opens up for lock escalation and deadlocks, doesn't it?  You are
> > probably thinking that it's okay to ignore those but I don't necessarily
> > agree with that.
>
> Agreed.  I think we're making a mountain out of a molehill here.  As
> long as the locks that are actually used are monotonic, just use > and
> stick a comment in there explaining that it could need adjustment if
> we use other lock levels in the future.  I presume all the lock-levels
> used for DDL are, and will always be, self-exclusive, so why all this
> hand-wringing?
>

New version attached with suggested changes.

Regards,

--
Fabrízio de Royes Mello
Consultoria/Coaching PostgreSQL
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