[jira] [Created] (FLINK-14903) Relax structured types constraints

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-14903:
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             Summary: Relax structured types constraints
                 Key: FLINK-14903
                 URL: https://issues.apache.org/jira/browse/FLINK-14903
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / API
            Reporter: Timo Walther
            Assignee: Timo Walther


As mentioned in FLIP-65:

In order to allow type extraction of structured types that are not registered in a catalog, we need to relax the structured type concept to "inline or anonymous structured types" that are not identified by an object identifier in a catalog but the fully qualified implementation class.

In order to support case classes and immutable types, we relax the constraint of enforcing a default constructor by the alternative of having a constructor that fully assigns all fields (same parameter names and types). Because we are already using code generation, the implementation of creating instances even without a default constructor is relatively easy.



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