Re: [HACKERS] 'Waiting on lock'

On 9/25/07, Simon Riggs <simon@2ndquadrant.com> wrote:
> On Tue, 2007-09-25 at 09:16 -0400, Tom Lane wrote:
> > Simon Riggs <simon@2ndquadrant.com> writes:
> > > SQLServer and DB2 have more need of this than PostgreSQL, but we do
> > > still need it.
> >
> > Why?  What does it do that statement_timeout doesn't do better?
>
> If the execution time is negligible, then setting statement_timeout is
> the same thing as setting a lock timeout.
>
> If execution time is not negligible, then you may want to tell the
> difference between waiting for completion against waiting forever
> without doing anything useful at all.
>

[...thinking on this a bit...]
mmm... i think we can emulate WAIT number_of_seconds using the NOWAIT
and a bit of logic...

point for tom

>
> Plus, if applications are written using these concepts it is easier to
> port them to PostgreSQL.
>

no words... point for simon...

> Not planning to work on this myself, but I think it is a valid TODO.
>

i will make a try for 8.4

--
regards,
Jaime Casanova

"Programming today is a race between software engineers striving to
build bigger and better idiot-proof programs and the universe trying
to produce bigger and better idiots.
So far, the universe is winning."
                                       Richard Cook