It's just the "approx_count_distinct" aggregate function.
On Tue, Nov 22, 2016 at 6:51 PM, Xinyu Zhang wrote:
> Could you please tell me how to use the approximate count distinct? Is
> there any docs?
>
> Thanks
>
>
> At 2016-11-21 15:56:21, "Reynold Xin"
Can you use the approximate count distinct?
On Sun, Nov 20, 2016 at 11:51 PM, Xinyu Zhang 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