Re: Connection Pooling, a year later

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От Bruce Momjian
Тема Re: Connection Pooling, a year later
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Msg-id 200112181512.fBIFCvn12736@candle.pha.pa.us
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Ответ на Re: Connection Pooling, a year later  (Tom Lane <tgl@sss.pgh.pa.us>)
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> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > No problem, it is just that rollbacks when you are not in a transaction
> > cause a log error message.
> 
> I don't see any difference in the behavior: you get a notice either way.
> 
> regression=# commit;
> NOTICE:  COMMIT: no transaction in progress
> COMMIT
> regression=# rollback;
> NOTICE:  ROLLBACK: no transaction in progress
> ROLLBACK
> regression=#
> 
> My recommendation would generally be to do a ROLLBACK not a COMMIT, on
> the grounds that if the previous user failed to complete his transaction
> you probably want to abort it, not assume that it's safe to commit.
> 
> However, this safety-first approach might be unworkable if you have a
> large body of existing code that all assumes it needn't issue COMMIT
> explicitly.

Sorry, I should have said do a "BEGIN;COMMIT;".  That only generates an
error message if a transaction was left open, and it commits the
left-open transaction.

We can add a SILENT keyword to COMMIT/ROLLBACK if people really want it.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026
 


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