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 <[email protected]> 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^_^
