Github user twalthr commented on the issue:
https://github.com/apache/flink/pull/6201
@suez1224 Yes sounds good to me. Only `from-field` timestamps matter right
now.
We should also think of the opposite of a timestamps extractor (timestamp
inserter) for cases where the rowtime needs some preprocessing (like e.g.
concatenation of a DATE and TIME column), but we can deal with such cases in a
follow up issue.
A helper method would be useful. We already have something similar in
`SchemaValidator` for schema derivation.
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