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https://issues.apache.org/jira/browse/FLINK-4549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15516778#comment-15516778
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ASF GitHub Bot commented on FLINK-4549:
---------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/2500
> Test and document implicitly supported SQL functions
> ----------------------------------------------------
>
> Key: FLINK-4549
> URL: https://issues.apache.org/jira/browse/FLINK-4549
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Timo Walther
> Fix For: 1.2.0
>
>
> Calcite supports many SQL functions by translating them into {{RexNode}} s.
> However, SQL functions like {{NULLIF}}, {{OVERLAPS}} are neither tested nor
> document although supported.
> These functions should be tested and added to the documentation. We could
> adopt parts from the Calcite documentation.
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