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https://issues.apache.org/jira/browse/FLINK-24554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17429208#comment-17429208
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Jark Wu commented on FLINK-24554:
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>From my knowledge, there is no metadata information for JSON data, because all
>the JSON fields can be reflected to Flink physical columns. I will close this
>issue for now. Please feel free to reopen it when you have concrete metadata
>to add, [~wangminchao].
> Support metadata columns for format-json
> ----------------------------------------
>
> Key: FLINK-24554
> URL: https://issues.apache.org/jira/browse/FLINK-24554
> Project: Flink
> Issue Type: New Feature
> Components: Formats (JSON, Avro, Parquet, ORC, SequenceFile)
> Reporter: WangMinChao
> Priority: Major
>
> * Currently, Flink-CDC already supports reading cdc RowData metadata columns
> in the PR.
> * [https://github.com/ververica/flink-cdc-connectors/pull/496]
> As users we expect this feature to be supported in the Flink branch.
> e.g : RowKind etc...
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