Github user wuchong commented on the issue:
https://github.com/apache/flink/pull/3039
I like this idea. In this way, we only need to provide `BatchTableSource`
and `StreamTableSource` interfaces, not involving the odd
`BatchStreamTableSource`. We can keep the interface very clean.
If I understand right, all the concrete implementation of `TableSource`
will not implement `DefinesFieldNames` for now ?
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