Re: How to return a modified array from a user-define function...

"D. Jay Newman" <jay@sprucegrove.com> writes:
> I would like to create a standard deviation function using the basic
> SQL statements "CREATE AGGREGATE" and "CREATE FUNCTION" using Postgres 7.0.2.

> I can't find a way to return a modified array.

It's possible to do this in pltcl but I don't think there is any syntax
for constructing array values on-the-fly in SQL or plpgsql functions.
(A definite shortcoming, that; should have a TODO item for it.)

BTW, stddev/variance are in current sources for 7.1.

            regards, tom lane