Github user fhueske commented on the issue:
https://github.com/apache/flink/pull/3166
I'm not sure about limiting the operator types @twalthr. If the TableSource
connects for example to a relational database, also complex predicates could be
evaluated in the source. There might also be data stores that can handle more
complex data types. In the end, the TableSource should decide which predicates
to except or not.
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