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From "Navis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-9215) Some mapjoin queries broken with IdentityProjectRemover with PPD
Date Mon, 29 Dec 2014 02:05:13 GMT

     [ https://issues.apache.org/jira/browse/HIVE-9215?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Navis updated HIVE-9215:
------------------------
    Attachment: HIVE-9215.1.patch.txt

As commented in code, select operator in RS-SEL-RS should not be removed because current compilers
are not expecting null reducer operator. We might modify compilers but seemed to much. Or
We can remove identity select in physical optimizer.

> Some mapjoin queries broken with IdentityProjectRemover with PPD
> ----------------------------------------------------------------
>
>                 Key: HIVE-9215
>                 URL: https://issues.apache.org/jira/browse/HIVE-9215
>             Project: Hive
>          Issue Type: Bug
>          Components: Logical Optimizer
>    Affects Versions: 0.15.0
>            Reporter: Szehon Ho
>         Attachments: HIVE-9215.1.patch.txt, auto_join_ppd.q
>
>
> IdentityProjectRemover (hive.optimize.remove.identity.project) with PPD will sometimes
make mapjoin query that returns the wrong result in MR case as well.



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