Re: Using PERFORM in plpgsql throws compile errors

Christian Armeanu wrote:
> Hi,
>
> I am trying to create a really simple pl/pgsql based function to simply
> return true or false depending on a query result ...
>
> As I do not need the query result row, I want to use PERFORM to dump the
> resulting data ... So, here's my attempt:
>
> CREATE OR REPLACE FUNCTION islicensed(int8, int8) RETURNS bool AS '
> DECLARE
>    pID ALIAS FOR $1;
>    aID ALIAS FOR $2;
> BEGIN
>    PERFORM SELECT * FROM transactions x INNER JOIN tx_items i ON(x.id =
> i.tx_id) where i.archive_id=aID and x.status=\'valid\' and x.person_id=pID;
>    RETURN FOUND;
> END;
> ' LANGUAGE 'plpgsql';
>
>
> However, even so the creation statement succeeds, any attempt to call
> this function throws a compilation error:
>
> ERROR:  syntax error at or near "SELECT" at character 9
> CONTEXT:  PL/pgSQL function "islicensed" line 5 at perform
>
> Why this? As I understand the docs, this is how it should work!?!
>
> Any help is highly appreciated.
>
> Oh, PostgreSQL 7.4.1 running on RH Linux ES 3.0 (not from RH rpm, but
> compiled from sources) ...

Remove the SELECT on the PERFORM statement:

PERFORM * FROM ....


Regards
Gaetano Mendola