Re: Creating Aggregate functions in PLpgSQL - Mailing list pgsql-general

"Matthew Dennis" <mdennis@merfer.net> writes:
> http://www.postgresql.org/docs/8.3/static/sql-createaggregate.html is for
> 8.3 where there were some changes to the number of arguments an aggregate
> could take.  I believe it's also more descriptive documentation.

Also see the overview at
http://www.postgresql.org/docs/8.3/static/xaggr.html

            regards, tom lane