Marios Trivyzas created FLINK-27312:
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Summary: Implicit casting should be introduced with Rules during
planning
Key: FLINK-27312
URL: https://issues.apache.org/jira/browse/FLINK-27312
Project: Flink
Issue Type: Improvement
Components: Table SQL / Planner
Reporter: Marios Trivyzas
Currently we do implicit casting directly in the code generation, and the plan
is not in sync with what is happening under the hood (in the generated code).
Ideally implicit casting should be introduced where necessary at an earlier
stage, during planning with a Rule, so that one can exactly see from the plan
produced what are the operations introduced automatically (implicit casting) to
make the SQL executable.
See for example: https://issues.apache.org/jira/browse/FLINK-27247
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