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  1. Flink
  2. FLINK-12251

Rework the Table API & SQL type system

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      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.

      https://docs.google.com/document/d/1a9HUb6OaBIoj9IRfbILcMFPrOL7ALeZ3rVI66dvA2_U/edit#

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        is related to

        New Feature - A new feature of the product, which has yet to be developed. FLINK-12710 Unify built-in and user-defined functions in the API modules

        • Major - Major loss of function.
        • Closed
        relates to

        Improvement - An improvement or enhancement to an existing feature or task. FLINK-12457 Remove char support in blink

        • Major - Major loss of function.
        • Closed

        Improvement - An improvement or enhancement to an existing feature or task. FLINK-13773 Rework of the Expression Design

        • Not a Priority -
        • Closed
        mentioned in

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            Unassigned Unassigned
            twalthr Timo Walther
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