From: | Adrian Klaver <adrian(dot)klaver(at)gmail(dot)com> |
---|---|
To: | a(dot)visinoni(at)autron(dot)it |
Cc: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: plpgsql loop question |
Date: | 2010-02-10 20:56:34 |
Message-ID: | 4B731D82.2010202@gmail.com |
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Thread: | |
Lists: | pgsql-sql |
On 02/10/2010 08:29 AM, Andrea Visinoni wrote:
> hi,
> i have a table called "zones": idzone, zone_name
> and several tables called zonename_records (same structure), where
> zonename is one of the zone_name in the "zones" table.
> What i want to do is a function that union all of this tables
> dinamically based on "zones" table, this is what i've done so far:
>
> CREATE OR REPLACE FUNCTION get_all_records()
> RETURNS SETOF record AS
> $BODY$DECLARE
> zones record;
> recs record;
> BEGIN
> for zones in select lower(zone_name) as n from zones loop
> for recs in select * from quote_ident(zones.n || '_records') loop
> return next recs;
> end loop;
> end loop;
> RETURN;
> END;
> $BODY$
> LANGUAGE 'plpgsql' VOLATILE
> COST 100;
>
> but i get this error!
>
> ERROR: wrong record type supplied in RETURN NEXT
> CONTEXT: PL/pgSQL function "get_all_records" line 9 at RETURN NEXT
>
> Andrea
>
One thing I would do is rename your zones record variable. pgsql does
not deal well with a variable having the same name as a schema object,
in this case your table zones.
--
Adrian Klaver
adrian(dot)klaver(at)gmail(dot)com
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