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https://issues.apache.org/jira/browse/TAJO-680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14696396#comment-14696396
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ASF GitHub Bot commented on TAJO-680:
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Github user hyunsik commented on the pull request:
https://github.com/apache/tajo/pull/620#issuecomment-130942866
+1
This patch looks great to me, and it includes enough unit tests to verify
its feature. I leaved very trivial comments. You can commit it after they
resolve them.
> Improve the IN operator to support sub queries
> ----------------------------------------------
>
> Key: TAJO-680
> URL: https://issues.apache.org/jira/browse/TAJO-680
> Project: Tajo
> Issue Type: Improvement
> Components: distributed query plan, SQL Parser
> Reporter: Jihoon Son
> Assignee: Jihoon Son
> Fix For: 0.11.0
>
> Attachments: Distributed plan.png, Logical plan.png
>
>
> Currently, the IN operator can be used with only sets of values.
> We need to improve it to support sub queries as the following example query.
> {noformat}
> tajo> select * from nation where n_regionkey in (select r_regionkey from
> region);
> {noformat}
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