[jira] [Updated] (HIVE-8151) Dynamic partition sort optimization inserts record wrongly to partition when used with GroupBy

["Prasanth J (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-8151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Prasanth J updated HIVE-8151:
-----------------------------
    Attachment: HIVE-8151.9.patch

Added fix for issue reported by [~wzc1989]. [~hagleitn] Can you take a look at changes to SemanticAnalyzer? The change is necessary for select operator deduplication to work properly. It sets columnExprMap for SelectOperator which was not populated/set for GBY query case. See discussion above for more info.

> Dynamic partition sort optimization inserts record wrongly to partition when used with GroupBy
> ----------------------------------------------------------------------------------------------
>
>                 Key: HIVE-8151
>                 URL: https://issues.apache.org/jira/browse/HIVE-8151
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.14.0, 0.13.1
>            Reporter: Prasanth J
>            Assignee: Prasanth J
>            Priority: Blocker
>             Fix For: 0.14.0
>
>         Attachments: HIVE-8151.1.patch, HIVE-8151.2.patch, HIVE-8151.3.patch, HIVE-8151.4.patch, HIVE-8151.5.patch, HIVE-8151.6.patch, HIVE-8151.7.patch, HIVE-8151.8.patch, HIVE-8151.9.patch
>
>
> HIVE-6455 added dynamic partition sort optimization. It added startGroup() method to FileSink operator to look for changes in reduce key for creating partition directories. This method however is not reliable as the key called with startGroup() is different from the key called with processOp(). startGroup() is called with newly changed key whereas processOp() is called with previously aggregated key. This will result in processOp() writing the last row of previous group as the first row of next group. This happens only when used with group by operator.
> The fix is to not rely on startGroup() and do the partition directory creation in processOp() itself.



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