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https://issues.apache.org/jira/browse/HIVE-15192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15720723#comment-15720723
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Vineet Garg commented on HIVE-15192:
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Looks like there was some change in master which broke every subquery test in
my branch (unable to resolve columns from outer query). Investigating more
> Use Calcite to de-correlate and plan subqueries
> -----------------------------------------------
>
> Key: HIVE-15192
> URL: https://issues.apache.org/jira/browse/HIVE-15192
> Project: Hive
> Issue Type: Task
> Components: Logical Optimizer
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Labels: sub-query
> Attachments: HIVE-15192.2.patch, HIVE-15192.3.patch, HIVE-15192.patch
>
>
> Currently support of subqueries is limited [Link to original spec |
> https://issues.apache.org/jira/secure/attachment/12614003/SubQuerySpec.pdf].
> Using Calcite to plan and de-correlate subqueries will help Hive get rid of
> these limitations.
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