Can you use the approximate count distinct?
On Sun, Nov 20, 2016 at 11:51 PM, Xinyu Zhang <wsz...@163.com> wrote: > > MapWithState is also very useful. > I want to calculate UV in real time, but "distinct count" and "multiple > streaming aggregations" are not supported. > Is there any method to calculate real-time UV in the current version? > > > > At 2016-11-19 06:01:45, "Michael Armbrust" <mich...@databricks.com> wrote: > > Doing this generally is pretty hard. We will likely support algebraic > aggregate eventually, but this is not currently slotted for 2.2. Instead I > think we will add something like mapWithState that lets users compute > arbitrary stateful things. What is your use case? > > > On Wed, Nov 16, 2016 at 6:58 PM, wszxyh <wsz...@163.com> wrote: > >> Hi >> >> Multiple streaming aggregations are not yet supported. When will it be >> supported? Is it in the plan? >> >> Thanks >> >> >> >> > > > > >
