I think it cannot be right.
> 在 2016年1月22日，下午4:53，汪洋 <tiandiwo...@icloud.com> 写道：
>
> Hi,
>
> Do we support distinct count in the over clause in spark sql?
>
> I ran a sql like this:
>
> select a, count(distinct b) over ( order by a rows between unbounded
> preceding and current row) from table limit 10
>
> Currently, it return an error says: expression ‘a' is neither present in the
> group by, nor is it an aggregate function. Add to group by or wrap in first()
> if you don't care which value you get.;
>
> Yang
>
