On Mon, 3 Apr 2006 14:57:14 +1000, "Harvey, Allan AC" <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> Can anyone offer suggestions on how to realise this function....
>
> It is the $1 as the table name that is the problem.
>
> I'm using Version 7.4.5
>
> create or replace function last_scan( varchar, varchar ) returns float as '
> declare
> result float;
>
> begin
> result := value from $1 where parameter = $2 order by dt desc limit 1;
>
> return result;
> end;
> ' LANGUAGE plpgsql;
try executing the query
declare
r record;
begin
for r in execute 'select value from '||quote_ident($1)||' where
parameter = '||quote_literal($2)||' order by dt desc limit 1' loop
return r.value;
end loop;
return null;
end;
klint.
+---------------------------------------+-----------------+
: Klint Gore : "Non rhyming :
: EMail : [EMAIL PROTECTED] : slang - the :
: Snail : A.B.R.I. : possibilities :
: Mail University of New England : are useless" :
: Armidale NSW 2351 Australia : L.J.J. :
: Fax : +61 2 6772 5376 : :
+---------------------------------------+-----------------+
---------------------------(end of broadcast)---------------------------
TIP 4: Have you searched our list archives?
http://archives.postgresql.org
