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From "Panagiotis Garefalakis (Jira)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-23730) Compiler support tracking TS keyColName for Probe MapJoin
Date Fri, 19 Jun 2020 13:32:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-23730?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Panagiotis Garefalakis updated HIVE-23730:
------------------------------------------
    Description: 
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.
The tracking can be done through the (ColumnExprMap) output column name to input expression
Map of the operators.

  was:
Compiler needs to track the original TS key columnName used for MJ probedecode.
Even thought 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.
The tracking can be done through the (ColumnExprMap) output column name to input expression
Map of the operators.


> 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: 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. The tracking can be done through the (ColumnExprMap) output column name to input
expression Map of the operators.



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