[jira] [Created] (FLINK-12251) Rework the Table API & SQL type system

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-12251:
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             Summary: Rework the Table API & SQL type system
                 Key: FLINK-12251
                 URL: https://issues.apache.org/jira/browse/FLINK-12251
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / API
            Reporter: Timo Walther
            Assignee: Timo Walther


Currently, the Table & SQL API relies on Flink’s TypeInformation at different positions in the code base. The API uses it for conversion between DataSet/DataStream API, casting, and table schema representation. The planning for code generation and serialization of runtime operators.

The past has shown that TypeInformation is useful when converting between DataSet/DataStream API, however, it does not integrate nicely with SQLs type system and depends on the programming language that is used.

There is consensus to perform a big rework of the type system with a better long-term vision and closer semantics to other SQL vendors and the standard itself.

FLIP-37 discusses the mid-term and long-term plan for supported types and their semantics.



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