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From 吴朱华 <ikew...@gmail.com>
Subject Re: Is there a plan to implement histogram support for computing column stats?
Date Wed, 21 Jun 2017 03:53:56 GMT
let me check it out^_^

2017-06-21 0:25 GMT+08:00 Jim Apple <jbapple@cloudera.com>:

> THis looks like the closest ticket to the question:
>
> https://issues.apache.org/jira/browse/IMPALA-2416
>
> Feel free to file another, more ambitious, ticket if you'd like.
>
> On Tue, Jun 20, 2017 at 4:10 AM, 吴朱华 <ikewu83@gmail.com> wrote:
> > Hi guys:
> >
> > Is there a plan to implement the histogram support for computing column
> > stats? Base on my assumption, if  the histogram support implements, it
> will
> > easily and more accurate to  predict the join involved row numbers, and
> > which will make a better decision for choosing the shuffle or the
> broadcast.
> > Above all is all my amateur thoughts, I love to hear your feedbacks^_^
>

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