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https://issues.apache.org/jira/browse/FLINK-37574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17939113#comment-17939113
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yux commented on FLINK-37574:
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I'd like to take this ticket. [~Leonard]
> Add UDTF support in YAML pipeline transform expressions
> -------------------------------------------------------
>
> Key: FLINK-37574
> URL: https://issues.apache.org/jira/browse/FLINK-37574
> Project: Flink
> Issue Type: New Feature
> Components: Flink CDC
> Reporter: yux
> Priority: Minor
>
> Currently, YAML transform expression only supports N-to-1 scalar functions,
> including built-in functions and user-defined ones. UDF functions returning
> many columns / rows could not be elegantly simulated with readability and
> efficiency.
> It is suggested to refactor "PostTransform" module at least amount to
> introduce row-flatten feature support, by introducing a new "FLATTEN ROW"
> keyword to expand a RowType data to multiple named columns.
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