Re: NOT EXIST for PREPARE

On Tue, Mar 22, 2016 at 10:01 AM, Andres Freund <andres(at)anarazel(dot)de> wrote:
>
> Hi,
>
>
> On 2016-03-22 12:41:43 +0300, Yury Zhuravlev wrote:
> > Do I understand correctly the only way know availability PREPARE it will
> > appeal to pg_prepared_statements?
> > I think this is not a good practice. In some cases, we may not be aware
of
> > the PREPARE made (pgpool). Moreover, it seems popular question in the
> > Internet:
http://stackoverflow.com/questions/1193020/php-postgresql-check-if-a-prepared-statement-already-exists
> >
> > What do you think about adding NOT EXIST functionality to PREPARE?
>
> Not very much. If you're not in in control of the prepared statements, you
> can't be sure it's not an entirely different statement. So NOT EXISTS
> doesn't really buy you anything, you'd still need to compare the
> statement somehow.
>

You're correct, but IMHO it should be used when you have control of
prepared statement... isn't it analogous to CREATE TABLE IF NOT EXISTS??

--
Fabrízio de Royes Mello
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