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https://issues.apache.org/jira/browse/SPARK-12602?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiao Li updated SPARK-12602:
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Description:
If applicable, we can push Inner Join through Outer Join. This can reduce the
number of rows since the Inner Join always can generate less rows than Outer
Join.
This can improve the performance.
was:If applicable, we can push Inner Join through Outer Join. This can reduce
the number of rows since the Inner Join always can generate less rows than
Outer Join.
> Join Reordering: Pushing Inner Join Through Outer Join
> ------------------------------------------------------
>
> Key: SPARK-12602
> URL: https://issues.apache.org/jira/browse/SPARK-12602
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.6.0
> Reporter: Xiao Li
> Priority: Critical
>
> If applicable, we can push Inner Join through Outer Join. This can reduce the
> number of rows since the Inner Join always can generate less rows than Outer
> Join.
> This can improve the performance.
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