On Fri, 26 Dec 2008 16:23:52 +0100
"Pavel Stehule" <pavel.stehule@gmail.com> wrote:
> 2008/12/26 Ivan Sergio Borgonovo <mail@webthatworks.it>:
> > On Fri, 26 Dec 2008 15:46:48 +0100
> > "Pavel Stehule" <pavel.stehule@gmail.com> wrote:
> >
> >> count has only one argument,
> >
> > then what was changed between 8.1 and 8.2 to change the docs?
> > None of the functions listed in:
> > http://www.postgresql.org/docs/8.2/static/functions-aggregate.html
> > seems to support
> > aggregate(distinct exp [,exp])
>
> http://www.postgresql.org/docs/8.2/interactive/functions-aggregate.html
>
> http://www.postgresql.org/docs/8.2/interactive/functions-aggregate.html#FUNCTIONS-AGGREGATE-STATISTICS-TABLE
yeah but no function seems to support
aggregate(distinct x, y)
> CREATE AGGREGATE name ( input_data_type [ , ... ] ) (
> SFUNC = sfunc,
> STYPE = state_data_type
> [ , FINALFUNC = ffunc ]
> [ , INITCOND = initial_condition ]
> [ , SORTOP = sort_operator ]
> )
OK... but how am I going to implement an user defined aggregate that
support without resorting to C?
myaggfunc(distinct x, y)?
Otherwise to what is it referring
http://www.postgresql.org/docs/8.2/interactive/sql-expressions.html
aggregate_name (DISTINCT expression [ , ... ] )
--
Ivan Sergio Borgonovo
http://www.webthatworks.it