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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