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https://issues.apache.org/jira/browse/HIVE-24242?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltan Haindrich updated HIVE-24242:
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Description:
there are some checks to lock out problematic cases
For UnionOperator
[here|https://github.com/apache/hive/blob/1507d80fd47aad38b87bba4fd58c1427ba89dbbf/ql/src/java/org/apache/hadoop/hive/ql/optimizer/SharedWorkOptimizer.java#L1571]
This check could prevent the optimization even if the Union is only visible
from only 1 of the TS ops.
was:
there are some checks to lock out problematic cases
For UnionOperator
[here|https://github.com/apache/hive/blob/1507d80fd47aad38b87bba4fd58c1427ba89dbbf/ql/src/java/org/apache/hadoop/hive/ql/optimizer/SharedWorkOptimizer.java#L1571])
This check could prevent the optimization even if the Union is only visible
from only 1 of the TS ops.
> Relax safety checks in SharedWorkOptimizer
> ------------------------------------------
>
> Key: HIVE-24242
> URL: https://issues.apache.org/jira/browse/HIVE-24242
> Project: Hive
> Issue Type: Improvement
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
>
> there are some checks to lock out problematic cases
> For UnionOperator
> [here|https://github.com/apache/hive/blob/1507d80fd47aad38b87bba4fd58c1427ba89dbbf/ql/src/java/org/apache/hadoop/hive/ql/optimizer/SharedWorkOptimizer.java#L1571]
> This check could prevent the optimization even if the Union is only visible
> from only 1 of the TS ops.
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