Re: More aggregate functions?

David Garamond <lists@zara.6.isreserved.com> writes:
> What do people think of adding some more aggregate functions. These are
> the ones that MySQL has and PG doesn't:

> - STD/STDDEV
> - VARIANCE

Have you read the documentation lately?

> - BIT_OR
> - BIT_AND
> - GROUP_CONCAT (for strings, added in MySQL 4.x)

Unless these are doing something I don't see, they should be easily
writable using CREATE AGGREGATE.

            regards, tom lane