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https://issues.apache.org/jira/browse/HIVE-23730?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Panagiotis Garefalakis updated HIVE-23730:
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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. Tracking can be done through the parent operator
ColumnExprMap and RowSchema.
was:
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.
> 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. Tracking can be done through the parent operator
> ColumnExprMap and RowSchema.
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