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https://issues.apache.org/jira/browse/SPARK-18637?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-18637.
---------------------------------
Resolution: Fixed
Fix Version/s: 2.1.0
Issue resolved by pull request 16068
[https://github.com/apache/spark/pull/16068]
> Stateful UDF should be considered as nondeterministic
> -----------------------------------------------------
>
> Key: SPARK-18637
> URL: https://issues.apache.org/jira/browse/SPARK-18637
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Zhan Zhang
> Fix For: 2.1.0
>
>
> If the annotation UDFType of a udf is stateful, it shoudl be considered as
> non-deterministic. Otherwise, the catalyst may optimize the plan and return
> the wrong result.
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