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From "Carl Steinbach (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2810) Implement NULL-safe equality operator <=>
Date Thu, 23 Feb 2012 06:39:50 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2810?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13214381#comment-13214381
] 

Carl Steinbach commented on HIVE-2810:
--------------------------------------

Have you looked at the code changes made in HIVE-741? My understanding is that before that
patch was committed Hive actually treated equi-joins as null-safe-equijoins, so it seems like
the patch should give you a pretty good idea of what needs to be modified.
                
> Implement NULL-safe equality operator <=>
> -----------------------------------------
>
>                 Key: HIVE-2810
>                 URL: https://issues.apache.org/jira/browse/HIVE-2810
>             Project: Hive
>          Issue Type: New Feature
>          Components: Query Processor, UDF
>    Affects Versions: 0.9.0
>            Reporter: Carl Steinbach
>            Assignee: Navis
>             Fix For: 0.9.0
>
>         Attachments: HIVE-2810.D1791.1.patch
>
>
> Ref: http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html#operator_equal-to

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