[jira] [Created] (FLINK-14414) Support string serializable for SymbolType

[Shang Yuanchun (Jira)]

Jark Wu created FLINK-14414:
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             Summary: Support string serializable for SymbolType
                 Key: FLINK-14414
                 URL: https://issues.apache.org/jira/browse/FLINK-14414
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / API
            Reporter: Jark Wu
            Assignee: Jark Wu


Currently, SymbolType has no serializable string representation, because it is an extension type. But we find that we still need to serialize the symbol type, because symbol literals are used in expressions, e.g. {{EXTRACT(DAY FROM DATE '1990-12-01')}}. If we want to serialize this experssion, the DAY symbol and type are also need to be serialized.



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