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https://issues.apache.org/jira/browse/HIVE-2532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13139367#comment-13139367
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Igor Kabiljo commented on HIVE-2532:
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@John: UDFRowSequence should already work, problem is when UDF returns
ConstantOI, but has side-effects.
One (not very useful) pair of UDFs for this could be FB_LOCAL_PROPERTY_SET(key,
value) and FB_LOCAL_PROPERTY_GET(key), where FB_LOCAL_PROPERTY_SET returns
ConstVoidOI, but has side-effects
> Evaluation of non-deterministic/stateful UDFs should not be skipped even if
> constant oi is returned.
> ----------------------------------------------------------------------------------------------------
>
> Key: HIVE-2532
> URL: https://issues.apache.org/jira/browse/HIVE-2532
> Project: Hive
> Issue Type: Bug
> Reporter: Jonathan Chang
> Assignee: Jonathan Chang
>
> Even if constant oi is returned, these may have stateful/side-effect behavior
> and hence need to be called each cycle.
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