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Posted to dev@impala.apache.org by 程亚楠 <ch...@foxmail.com> on 2019/08/27 01:14:41 UTC

asking for some help about impala-udaf

Hello Everyone:
When I use c++ to develop my own Impala-UDAFs，how can I do to make my own Impala-UDAFs support the OVER analytic function
such as:
select myudaf(column1,column2) over(partition by column1 order by column2) from mytable;


Thank you for taking the time to read my letter!

Re: asking for some help about impala-udaf

Posted by Tim Armstrong <ta...@cloudera.com>.

We don't currently support user-defined analytics. They are similar to
aggregate functions but would need a few additions to make them work.

On Mon., 26 Aug. 2019, 18:15 程亚楠, <ch...@foxmail.com> wrote:

> Hello Everyone:
> When I use c++ to develop my own Impala-UDAFs，how can I do to make my own
> Impala-UDAFs support the OVER analytic function
> such as:
> select myudaf(column1,column2) over(partition by column1 order by column2)
> from mytable;
>
>
> Thank you for taking the time to read my letter!