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https://issues.apache.org/jira/browse/HIVE-20477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16595076#comment-16595076
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Zoltan Haindrich commented on HIVE-20477:
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[~ashutoshc] I'm not sure what we should do here: this patch will be needed -
but it doesn't change really anything as long as we don't have CALCITE-2444....
should we wait with this the 1.18 release, or get it in earlier?
I've attached a sample patch....it only needs some changes in the HiveIn.java ;
to be able to unparse the in expression as they are in Calcite...
> OptimizedSql is not shown if the expression contains INs
> --------------------------------------------------------
>
> Key: HIVE-20477
> URL: https://issues.apache.org/jira/browse/HIVE-20477
> Project: Hive
> Issue Type: Improvement
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Attachments: HIVE-20477.01wip01.patch
>
>
> This ticket should fix HiveIn to be able to unparse; currently if an IN is
> unparsed - there are some exceptions because HiveIn is a special operator;
> but doesn't have unparse implemented.
> CALCITE-2444 is also needed to fix rel2sql to be able to process INs which
> are not there represent a subquery.
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