Re: Strange loop

You are concatenating with a null value, which causes the result to be null.
See below, I have fixed it.

Regards,

Aasmund
On Tue, 30 Oct 2001 22:05:15 +0100, Torbjörn Andersson <tobbe(at)embryo(dot)se> wrote:
> Hi,
>
> I need some help with the function below. My intention is to hand the
> content of result_store and sort it out so that I can have a complete
> recordset. But for some reason result_store is returned empty. It works fine
> for one row but the concatenation of result_store and result does not seem
> to work.
>
> Can some one pleas explain why?
>
>
>
> CREATE FUNCTION f_snus()
> RETURNS varchar
> AS
> ' DECLARE
> result varchar := '''';
> result_store varchar := '''';
> row record;
> BEGIN
> FOR row IN
> SELECT snus_id, namn, betyg FROM snus ORDER BY betyg
> LOOP
> SELECT INTO result row.snus_id || ''\t'' || row.namn ||
> ''\t'' || row.betyg || ''\n'';
> result_store := result_store || result;
> END LOOP;
> RETURN result_store;
> END;
> ' LANGUAGE 'PLPGSQL';
>
>
>
> Regards
>
> Torbjörn Andersson
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Aasmund Midttun Godal

aasmund(at)godal(dot)com - http://www.godal.com/
+47 40 45 20 46