On Mon, 26 Jul 1999, Vadim Mikheev wrote:
> Date: Mon, 26 Jul 1999 10:50:28 +0800
> From: Vadim Mikheev <vadim@krs.ru>
> To: Philip Warner <pjw@rhyme.com.au>
> Cc: pgsql-hackers@postgreSQL.org, pgsql-sql@postgreSQL.org,
> Oleg Bartunov <oleg@sai.msu.su>
> Subject: Re: [HACKERS] Re: [SQL] inserts/updates problem understressing !
>
> Philip Warner wrote:
> >
> > The usual way around this sort of problem is to update the counter as the
> > first thing you do in any transaction. This locks the row and prevents any
> > possible deadlock:
>
> But if there was no record then nothing will be locked...
> Without ability to read dirty data LOCK is the only way.
>
I agree, no data, no locking.
> ...
>
> > diagnostics' is not yet applied (I may not have mailed it yet...), and I am
> > not sure if plpgsql starts a new TX for each statment - if so, you need to
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> It doesn't.
>
> > start a TX in the procedure, or prior to valling it.
How do I start a TX in the procedure ? Is't possible ?
I don't understand this because a procedure must return something, so
there're no point where to end a TX.
Oleg
>
> Vadim
>
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