Column group statistics is not supported in hive yet. Thanks Prasanth
Sent from my iPhone > On Jun 8, 2014, at 6:33 PM, Alex Nastetsky <anastet...@spryinc.com> wrote: > > Table statistics collection was added in HIVE-33 (numRows, rawDataSize, etc). > Is there anything that lets you create your own statistics gathering? > > For example, given table A with columns x, y, z, I want to gather > count(distinct x, y) as a statistic that would be stored in the metastore. > > I know there exist column level statistics that have approximations for > distinct for a single column, but that doesn't help my use case above where I > have 2 columns involved. > > Thanks, > Alex. -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
