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https://issues.apache.org/jira/browse/FLINK-9391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16591754#comment-16591754
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Hequn Cheng commented on FLINK-9391:
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Hi [~SokolovMS], Thanks for contributing to Flink. You are right, UNNEST is
built on top of the user-define table function which is different from other
scalar functions. Tests about table functions can be found in
\{{CorrelateITCase}}, you can have a research on the implementation. If you
have any questions feel free to ask.
> Support UNNEST in Table API
> ---------------------------
>
> Key: FLINK-9391
> URL: https://issues.apache.org/jira/browse/FLINK-9391
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Alina Ipatina
> Priority: Major
>
> FLINK-6033 introduced the UNNEST function for SQL. We should also add this
> function to the Table API to keep the APIs in sync.
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