[jira] [Created] (ASTERIXDB-2559) UNION type causes UDF type casting to fail

[Xikui Wang (JIRA)]

Xikui Wang created ASTERIXDB-2559:
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             Summary: UNION type causes UDF type casting to fail
                 Key: ASTERIXDB-2559
                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-2559
             Project: Apache AsterixDB
          Issue Type: Bug
            Reporter: Xikui Wang


When a parameter is UNION typed, the 
IntroduceDynamicTypeCastForExternalFunctionRule would fail. 



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