[jira] [Commented] (HIVE-23730) Compiler support tracking TS keyColName for Probe MapJoin

["Jesus Camacho Rodriguez (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-23730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17160857#comment-17160857 ] 

Jesus Camacho Rodriguez commented on HIVE-23730:
------------------------------------------------

+1

> Compiler support tracking TS keyColName for Probe MapJoin
> ---------------------------------------------------------
>
>                 Key: HIVE-23730
>                 URL: https://issues.apache.org/jira/browse/HIVE-23730
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Panagiotis Garefalakis
>            Assignee: Panagiotis Garefalakis
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 1h 10m
>  Remaining Estimate: 0h
>
> Compiler needs to track the original TS key columnName used for MJ probedecode.
> Even though we know the MJ keyCol at compile time, this could be generated by previous (parent) operators thus we dont always know the original TS column it maps to.
> To find the original columnMapping, we need to track the MJ keyCol through the operator pipeline. Tracking can be done through the parent operator ColumnExprMap and RowSchema.



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