Return multiple fields as a record in PostgreSQL with PL/pgSQL

Question

I am writing a SP, using PL/pgSQL.
I want to return a record, comprised of fields from several different tables. Could look something like this:

CREATE O         


        

Answer 1

If you have a table with this exact record layout, use its name as a type, otherwise you will have to declare the type explicitly:

CREATE OR REPLACE FUNCTION get_object_fields
        (
        name text
        )
RETURNS mytable
AS
$$
        DECLARE f1 INT;
        DECLARE f2 INT;
        …
        DECLARE f8 INT;
        DECLARE retval mytable;
        BEGIN
        -- fetch fields f1, f2 and f3 from table t1
        -- fetch fields f4, f5 from table t2
        -- fetch fields f6, f7 and f8 from table t3
                retval := (f1, f2, …, f8);
                RETURN retval;
        END
$$ language plpgsql;