[jira] [Created] (FLINK-12996) Add predefined type validators, strategies, and transformations

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-12996:
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             Summary: Add predefined type validators, strategies, and transformations
                 Key: FLINK-12996
                 URL: https://issues.apache.org/jira/browse/FLINK-12996
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / API
            Reporter: Timo Walther
            Assignee: Timo Walther


 FLINK-12924 introduced new interfaces for performing type inference. We need a set of predefined type validators, strategies, and transformations implemented with the new interfaces in order to represent the old type checking logic. Those interfaces can be inspired by Calcite's {{org.apache.calcite.sql.type.ReturnTypes}}, {{org.apache.calcite.sql.type.OperandTypes}}, and {{org.apache.calcite.sql.type.SqlTypeTransforms}}.



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