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