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https://issues.apache.org/jira/browse/HIVE-3670?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yin Huai resolved HIVE-3670.
----------------------------
Resolution: Not A Problem
Based on the code of setChildren in MapOperator, if multiple TableScanOperators
are associated to the same path, those TableScanOperators will all be added
into the children list of MapOperator. We can take advantage of it by adding
optimizations (in separate jiras) which can make sure those operation paths
using the same inputs can be executed in the same MR job. I will close this
jira as "Not A Problem".
> Optimize queries involving self join
> ------------------------------------
>
> Key: HIVE-3670
> URL: https://issues.apache.org/jira/browse/HIVE-3670
> Project: Hive
> Issue Type: Sub-task
> Components: Query Processor
> Reporter: Yin Huai
> Assignee: Yin Huai
>
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