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https://issues.apache.org/jira/browse/HIVE-2532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13146526#comment-13146526
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Phabricator commented on HIVE-2532:
-----------------------------------
jsichi has commented on the revision "HIVE-2532 [jira] Evaluation of
non-deterministic/stateful UDFs should not be skipped even if constant oi is
returned.".
Try this:
SELECT 1+ASSERT_TRUE(x < 2) FROM src LATERAL VIEW EXPLODE(ARRAY(1, 2)) a AS x
LIMIT 2;
I assume it should hit an exception, but it actually passes. Guess why?
INLINE COMMENTS
ql/src/java/org/apache/hadoop/hive/ql/exec/ExprNodeGenericFuncEvaluator.java:144
FunctionRegistry.isDeterministic always returns false for a stateful UDF, so
you don't need to double-check here.
REVISION DETAIL
https://reviews.facebook.net/D273
> 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
> Attachments: D273.1.patch
>
>
> 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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