Matt Burgess created DRILL-3199:
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             Summary: GenericAccessor doesn't support isNull
                 Key: DRILL-3199
                 URL: https://issues.apache.org/jira/browse/DRILL-3199
             Project: Apache Drill
          Issue Type: Bug
          Components: Client - JDBC
         Environment: I found this problem when calling the driver's wasNull() 
method on a field that represented a nested JSON object (one level below the 
root object), using the 'dfs' storage plugin and pointing at my local 
filesystem.
            Reporter: Matt Burgess
            Assignee: Daniel Barclay (Drill)


GenericAccessor throws an UnsupportedOperationException when isNull() is 
called. However for other methods it delegates to its ValueVector's accessor. I 
think it should do the same for isNull().





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