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https://issues.apache.org/jira/browse/HIVE-17934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16245278#comment-16245278
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Ashutosh Chauhan commented on HIVE-17934:
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* If one of TS is partial, then I think its correct to have child as PARTIAL
too.
* If stats exist and are 0 then we shall consider it to be complete, if stats
are missing then it should be partial.
I thinking breaking it down in series of smaller patches is a good idea. Both
from review point of view and also to facilitate backports to older branches if
needed.
> Merging Statistics are promoted to COMPLETE (most of the time)
> --------------------------------------------------------------
>
> Key: HIVE-17934
> URL: https://issues.apache.org/jira/browse/HIVE-17934
> Project: Hive
> Issue Type: Bug
> Components: Statistics
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Attachments: HIVE-17934.01.patch, HIVE-17934.02.patch,
> HIVE-17934.03.patch, HIVE-17934.04.patch, HIVE-17934.05.patch,
> HIVE-17934.06wip01.patch
>
>
> in case multiple partition statistics are merged the STATS state is computed
> based on the datasize and rowcount;
> the merge may hide away non-existent stats in case there are other partition
> or operators which do contribute to the datasize and the rowcount.
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