set returning functions in v7.3

Sorry I forgot the error messege. The back end says:
db=# select * from getgroups();
ERROR: parser: parse error at or near "("

But:
db=# select getgroups();
getgroups
-----------
136521504
(1 row)

What is this? Is it an OID?

----- Original Message -----
From: "Együd Csaba" <csegyud(at)freemail(dot)hu>
To: "pgsql-general" <pgsql-general(at)postgresql(dot)org>
Sent: Thursday, February 13, 2003 7:13 PM
Subject: set returning functions in v7.3

> Hello,
> I have a problem with "set returning functions".
> I have a table t_groups. I would like to get the rows of it. I try to call
> this function:
>
> create or replace function getgroups() returns setof t_groups as '
> select * from t_groups;
> ' language 'sql';
>
> in the this way:
>
> select * from getgroups();
>
> It should have returned with all the rows from t_groups. It did not. Where
> is the problem?
> If ther would be anybody who can help me I wuld be greatful.
>
> Thank you very much.
> Best regards, Csaba Egyud
>
>