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[jira] [Created] (CALCITE-2670) Combine similar JSON aggregate functions in operator table


Hongze Zhang created CALCITE-2670:
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             Summary: Combine similar JSON aggregate functions in operator table
                 Key: CALCITE-2670
                 URL: https://issues.apache.org/jira/browse/CALCITE-2670
             Project: Calcite
          Issue Type: Improvement
          Components: core
            Reporter: Hongze Zhang
            Assignee: Julian Hyde


Improvement contains following:
 # Combine *JSON_ARRAYAGG_NULL_ON_NULL* and *JSON_ARRAYAGG_ABSENT_ON_NULL*
 # Combine *JSON_OBJECTAGG_NULL_ON_NULL* and *JSON_OBJECTAGG_ABSENT_ON_NULL*
 # Add *SYMBOL* type Support for *JavaTypeFactoryImpl#getJavaClass*
 This is to generate *Enum* java type for *SYMBOL*. Current version of Calcite generates *Object[]*, which delivers type casting error, or some method compatible problems when we combine the functions above.
 # Add SQL-to-Rel test cases for JSON functions.



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