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https://issues.apache.org/jira/browse/CALCITE-1655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15881675#comment-15881675
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Julian Hyde commented on CALCITE-1655:
--------------------------------------

Disabling the rewriting of IN to OR is probably not a good idea. After all, 
people could write the query as an OR and we'd like that to work too.

I really need a test case. It's difficult to visualize what's happening without 
one.

> Add In filter to druid adapter.
> -------------------------------
>
>                 Key: CALCITE-1655
>                 URL: https://issues.apache.org/jira/browse/CALCITE-1655
>             Project: Calcite
>          Issue Type: Bug
>          Components: druid
>            Reporter: slim bouguerra
>            Assignee: Julian Hyde
>
> The druid calcite adapter throw an exception when an IN filter is used.
> This happens only in hive because in calcite project the IN filter is 
> transformed to OR automatically. 
> Since this rule does not kick in HIVE and it is better to use the native IN 
> filter from druid instead having huge number of OR clauses i will send a 
> patch that adds the IN filter.  



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