[jira] [Created] (FLINK-20704) Some rel data type does not implement the digest correctly

[Shang Yuanchun (Jira)]

Danny Chen created FLINK-20704:
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             Summary: Some rel data type does not implement the digest correctly
                 Key: FLINK-20704
                 URL: https://issues.apache.org/jira/browse/FLINK-20704
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Legacy Planner
    Affects Versions: 1.11.3, 1.12.0
            Reporter: Danny Chen
             Fix For: 1.12.1


Some of the rel data types for legacy planner:

- {{GenericRelDataType}}
- {{ArrayRelDataType}}
- {{MapRelDataType}}
- {{MultisetRelDataType}}

Does not implement the digest correctly, especially for {{GenericRelDataType}} , the {{RelDataTypeFactory}} caches the type instances based on its digest, a wrong digest impl would mess up the type instance creation, e.g. without this patch, all the {{GenericRelDataType}} instances have same digest `ANY`.



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