On 5/11/07, Robins <[EMAIL PROTECTED]> wrote:
Hi Gabriel,
There are two ways to do this:
1. Imad's way (Define the function with the return type as RECORD). Its only
problem is that while querying from this function, you need to give a proper
SELECT query or else PG returns an error.
Yeah ... valid point.
e.g. As Imad gives in his example ...
CREATE FUNCTION xyz() RETURNS record AS
$$
declare
abc RECORD;
begin
abc := (1, 2);
return abc;
end;
$$
language plpgsql;
And execute the function in this fashion:
select a, b from xyz() as (a int, b int);
The only problem with this is that if you have 6 elements your select
statement becomes quite long. Also, in case your function return parameter
count changes, or its types change, you would need to change the SELECT SQL
at all the places.
2. Define a TYPE as John mentioned, and set the function's return type as
this TYPE. The advantage is that you can always redefine the function and
the type in case the return parameters are changing and that your select
statement is a simple SELECT * from fn().
The drawback is that you need to know the complete definition in
advance. In contrast, you can assign any type of row to a RECORD
variable ... much more flexible.
--Imad
www.EnterpriseDB.com
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