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From "Daniel Jurcau (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-5110) Query containing datatype conversions fails with vague error if column contains only null
Date Tue, 06 Dec 2016 07:39:58 GMT
Daniel Jurcau created DRILL-5110:
------------------------------------

             Summary: Query containing datatype conversions fails with vague error if column
contains only null
                 Key: DRILL-5110
                 URL: https://issues.apache.org/jira/browse/DRILL-5110
             Project: Apache Drill
          Issue Type: Bug
          Components: Functions - Drill
    Affects Versions: 1.8.0
            Reporter: Daniel Jurcau


Issuing a query like 
SELECT CONVERT_FROM(CONVERT_TO(columnName, 'json'), 'utf8') FROM fails if columnName is not
present in the current dataset being queried, or contains only nulls. 

Error received: org.apache.drill.common.exceptions.UserRemoteException: SYSTEM ERROR: UnsupportedOperationException:
Unable to get holder type for minor type [LATE] and mode [OPTIONAL] Fragment 0:0



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