Re: check table existence...

Something like this will help you......

=======================

CREATE OR REPLACE FUNCTION public.check_table(varchar, varchar)
RETURNS boolean AS $$
DECLARE
v_cnt integer;
v_tbl boolean;
BEGIN
SELECT count(1) INTO v_cnt FROM pg_tables where tablename = $1 and
schemaname = $2;

IF v_cnt > 0 THEN
v_tbl = 'true';
END IF;

IF v_cnt = 0 THEN
v_tbl = 'false';
END IF;
return v_tbl;
END;
$$ LANGUAGE 'plpgsql'

=========================

select check_table('emp', 'public');

-----------------------
Shoaib Mir
EnterpriseDB (www.enterprisedb.com)

On 1/15/07, Alban Hertroys <alban(at)magproductions(dot)nl> wrote:
>
> A. Kretschmer wrote:
> > am Mon, dem 15.01.2007, um 13:18:11 +0100 mailte Moritz Bayer
> folgendes:
> >> Dear list,
> >>
> >> I would like to create a function which gets a tablename and checks if
> the
> >> specific table exists.The return value should be a bool.
> >> Now I'm wondering how to do this the best way.
> >>
> >> Any suggestions?
> >
> > You can ask pg_tables:
> >
> > select count(1) from pg_tables where tablename = 'foo' and schemaname =
> 'public';
> >
> >
> > This ask for a table called 'foo' in the schema 'public'.
>
> If you do (something like) that in pl/pgsql, you could RETURN FOUND
> after performing that query.
>
> --
> Alban Hertroys
> alban(at)magproductions(dot)nl
>
> magproductions b.v.
>
> T: ++31(0)534346874
> F: ++31(0)534346876
> M:
> I: www.magproductions.nl
> A: Postbus 416
> 7500 AK Enschede
>
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