Re: Use of LOCAL in SET command

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От Tom Lane
Тема Re: Use of LOCAL in SET command
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Msg-id 21088.1024951070@sss.pgh.pa.us
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Ответ на Use of LOCAL in SET command  (Peter Eisentraut <peter_e@gmx.net>)
Ответы Re: Use of LOCAL in SET command  (Bruce Momjian <pgman@candle.pha.pa.us>)
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Peter Eisentraut <peter_e@gmx.net> writes:
> Sorry to nag about this so late, but I fear that the new command SET LOCAL
> will cause some confusion later on.

Okay...

> SQL uses LOCAL to mean the local node in a distributed system (SET LOCAL
> TRANSACTION ...) and the current session as opposed to all sessions (local
> temporary table).  The new SET LOCAL command adds the meaning "this
> transaction only".  Instead we could simply use SET TRANSACTION, which
> would be consistent in behaviour with the SET TRANSACTION ISOLATION LEVEL
> command.

Hmm ... this would mean that the implicit parsing of SET TRANSACTION
ISOLATION LEVEL would change (instead of SET / TRANSACTION ISOLATION
LEVEL you'd now tend to read it as SET TRANSACTION / ISOLATION LEVEL)
but I guess that would still not create any parse conflicts.  I'm okay
with this as long as we can fix psql's command completion stuff to
handle it intelligently.  I hadn't gotten round to looking at that point
yet for the LOCAL case; do you have any thoughts?
        regards, tom lane




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