From: | Hans Peter Wuermli <wurmli(at)freesurf(dot)ch> |
---|---|
To: | pgsql-bugs(at)postgresql(dot)org |
Subject: | Concat error in PL/pgsql |
Date: | 2001-01-06 17:29:22 |
Message-ID: | 200101061729.SAA31739@obelix.spectraweb.ch |
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Thread: | |
Lists: | pgsql-bugs |
I don't have a bug template at hand.
Within a plpgsql function, concatenating TEXT strings from tables that allow NULL values return nil results. Please run the following. The result of the second select is nil.
Cheers, H.P.
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create table tconcattest (id char(3),str text);
insert into tconcattest values('hpw',text('Something...'));
insert into tconcattest values('wuh',text('and more of something.'));
create function fconcattest () returns text as'
declare
r record;
output text;
begin
output := text('''');
for r in select * from tconcattest loop
output := output || r.str;
end loop;
return output;
end;
' language 'plpgsql';
select fconcattest();
insert into tconcattest values('abc',NULL);
select fconcattest();
update tconcattest set str='...again' where id='abc';
select fconcattest();
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