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Posted to issues@hive.apache.org by "Eugene Koifman (JIRA)" <ji...@apache.org> on 2018/03/01 00:49:00 UTC

[jira] [Commented] (HIVE-18824) ValidWriteIdList config should be defined on tables which has to collect stats after insert.

    [ https://issues.apache.org/jira/browse/HIVE-18824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16381330#comment-16381330 ] 

Eugene Koifman commented on HIVE-18824:
---------------------------------------

yes, that is basically the problem.

> ValidWriteIdList config should be defined on tables which has to collect stats after insert.
> --------------------------------------------------------------------------------------------
>
>                 Key: HIVE-18824
>                 URL: https://issues.apache.org/jira/browse/HIVE-18824
>             Project: Hive
>          Issue Type: Sub-task
>          Components: HiveServer2, Transactions
>    Affects Versions: 3.0.0
>            Reporter: Sankar Hariappan
>            Assignee: Sankar Hariappan
>            Priority: Major
>              Labels: ACID, isolation
>             Fix For: 3.0.0
>
>
> In HIVE-18192 , per table write ID was introduced where snapshot isolation is built using ValidWriteIdList on tables which are read with in a txn. ReadEntity list is referred to decide which table is read within a txn.
> For insert operation, table will be found only in WriteEntity, but the table is read to collect stats.
> So, it is needed to build the ValidWriteIdList for tables/partition part of WriteEntity as well.



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