Re: Isolating a record column from a PL-Pgsql function call ?

"Gauthier, Dave" <dave.gauthier@intel.com> writes:
> I have a PL-Pgsql function that returns a record of a type that have 4 elements (columns).  Let's say the first
element/columnis called "id_num".  Is there a way I can specify the id_num element of the record returned from iside a
query?

> For example, select col1 from thetable where my_plpgsql_fn(col2).id_num = 123;

You're just missing some parentheses:

select col1 from thetable where (my_plpgsql_fn(col2)).id_num = 123;

as indeed is documented here:
http://www.postgresql.org/docs/8.3/static/sql-expressions.html#AEN1679

There are messy syntactic reasons for requiring these parens, which
I don't recall the details of at the moment ...

            regards, tom lane