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From "Vineet Garg (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-18241) Query with LEFT SEMI JOIN producing wrong result
Date Tue, 12 Dec 2017 05:35:03 GMT

    [ https://issues.apache.org/jira/browse/HIVE-18241?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16287145#comment-16287145
] 

Vineet Garg commented on HIVE-18241:
------------------------------------

[~jcamachorodriguez] Actually this test helped us finding this bug, it wasn't suppose to produce
any data but due to bug was producing data. So I think this test still has value. I'll see
if I can add another test which produces data.

> Query with LEFT SEMI JOIN producing wrong result
> ------------------------------------------------
>
>                 Key: HIVE-18241
>                 URL: https://issues.apache.org/jira/browse/HIVE-18241
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Vineet Garg
>            Assignee: Vineet Garg
>         Attachments: HIVE-18241.1.patch, HIVE-18241.2.patch
>
>
> Following query produces wrong result
> {code:sql}
> select key, value from src outr left semi join (select a.key, b.value from src a join
(select distinct value from src) b on a.value > b.value group by a.key, b.value) inr on
outr.key=inr.key and outr.value=inr.value;
> {code}
> Expected result is empty set but it output bunch of rows.
> Schema for {{src}} table could be find in {{data/scripts/q_test_init.sql}}



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