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https://issues.apache.org/jira/browse/FLINK-7014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16067625#comment-16067625
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ASF GitHub Bot commented on FLINK-7014:
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Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/4200
> Expose isDeterministic interface to ScalarFunction and TableFunction
> --------------------------------------------------------------------
>
> Key: FLINK-7014
> URL: https://issues.apache.org/jira/browse/FLINK-7014
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Ruidong Li
> Assignee: Ruidong Li
> Fix For: 1.4.0
>
>
> Currently, the `isDeterministic` method of implementations of `SqlFuntion`
> are always returning true, which cause inappropriate optimization in Calcite,
> such as taking user's stateful UDF as a pure functional procedure.
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