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
