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From "Harish Butani (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-784) Support uncorrelated subqueries in the WHERE clause
Date Fri, 04 Oct 2013 23:30:44 GMT

    [ https://issues.apache.org/jira/browse/HIVE-784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13786749#comment-13786749
] 

Harish Butani commented on HIVE-784:
------------------------------------

Just uploaded a script with tpch queries Q4, Q15, Q16 and Q18 written using SubQueries.
Validated results against what is in the Spec.
Script includes ddl at the bottom.

> Support uncorrelated subqueries in the WHERE clause
> ---------------------------------------------------
>
>                 Key: HIVE-784
>                 URL: https://issues.apache.org/jira/browse/HIVE-784
>             Project: Hive
>          Issue Type: New Feature
>          Components: Query Processor
>            Reporter: Ning Zhang
>            Assignee: Matthew Weaver
>         Attachments: HIVE-784.1.patch.txt, HIVE-784.2.patch, SubQuerySpec.pdf, tpchQueriesUsingSubQueryClauses.sql
>
>
> Hive currently only support views in the FROM-clause, some Facebook use cases suggest
that Hive should support subqueries such as those connected by IN/EXISTS in the WHERE-clause.




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