join between a table and function.

[Lauri Kajan <lauri.kajan@xxxxxxxxx>]

Hi all,

I have made a function returning a custom record type that contains two fields.
Now I want to select from that function. Actually I want to make a
join with a table.

Let me explain.

Here is my function:
CREATE TYPE attributes AS (class integer, type integer);
CREATE OR REPLACE FUNCTION getAttributes(id integer) RETURNS attributes AS $$
DECLARE
  returnRecord attributes;
BEGIN
  /*
  *
  */
  RETURN returnRecord;
END;
$$ LANGUAGE plpgsql;

And I want to find attributes for one record in a table using my
function that gets a record id as a parameter.
I have tried following:
select
  *
from
  myTable a,
  getAttributes(a.id);

I'll get ERROR:  function expression in FROM cannot refer to other
relations of same query level.
That is pretty obvious.

I have also tried:
select
*, getAttributes(a.id)
from
  myTable a

That works almost. I'll get all the fields from myTable, but only a
one field from my function type of attributes.
myTable.id | myTable.name | getAttributes
integer      | character        | attributes
123           | "record name" | (10,20)



What is the right way of doing this?


Thanks

-Lauri

-- 
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general