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From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-7111) Extend join transitivity PPD to non-column expressions
Date Sun, 08 Jun 2014 18:40:02 GMT

    [ https://issues.apache.org/jira/browse/HIVE-7111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14021253#comment-14021253
] 

Gopal V commented on HIVE-7111:
-------------------------------

Is deterministic enough? They need to be algebraic as well, with no internal state.

I recently saw someone write a minSoFar() UDF, which returns false/true according to the previous
rows fed in.

> Extend join transitivity PPD to non-column expressions
> ------------------------------------------------------
>
>                 Key: HIVE-7111
>                 URL: https://issues.apache.org/jira/browse/HIVE-7111
>             Project: Hive
>          Issue Type: Task
>          Components: Query Processor
>            Reporter: Navis
>            Assignee: Navis
>            Priority: Minor
>
> Join transitive in PPD only supports column expressions, but it's possible to extend
this to generic expressions.



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