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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-20219) analyze and analyze for columns don't manage stats state correctly
Date Fri, 20 Jul 2018 23:54:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-20219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16551439#comment-16551439
] 

Sergey Shelukhin commented on HIVE-20219:
-----------------------------------------

The issue is specific to txn stats

> analyze and analyze for columns don't manage stats state correctly
> ------------------------------------------------------------------
>
>                 Key: HIVE-20219
>                 URL: https://issues.apache.org/jira/browse/HIVE-20219
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>            Priority: Major
>
> Discovered while adding tests in HIVE-20029
> Step 1. Have a table with fully correct txn stats.
> Step 2. Run some query that sets stats to invalid (e.g. parallel inserts).
> Step 3. Run analyze without for columns...
> Result is that while only basic stats are updated, the flag is set to true with old column
stats values.
> I blame json; if stats state was stored in proper places this kind of bug would be very
unlikely.
> Not sure if this would affect master, I'll add a test; ACID stats invalidation definitely
needs to invalidate all the stats, not just basic stats flag, when invalidating.



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