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  1. Tajo
  2. TAJO-866

COUNT DISTINCT with other aggregation function throws ClassCastException.

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.9.0
    • Component/s: None
    • Labels:
      None

      Description

      I tested with the following data and query.

      default> select * from table1;
      id,code,qty
      -------------------------------
      1,a,3
      1,a,4
      1,b,5
      2,a,1
      2,c,2
      2,d,3
      
      default> select id, count(distinct code), avg(qty) from table101 group by id;
      2014-06-05 21:29:56,960 ERROR: org.apache.tajo.worker.Task (run(390)) - org.apache.tajo.datum.NullDatum cannot be cast to org.apache.tajo.datum.ProtobufDatum
      java.lang.ClassCastException: org.apache.tajo.datum.NullDatum cannot be cast to org.apache.tajo.datum.ProtobufDatum
      	at org.apache.tajo.engine.function.builtin.AvgLong.merge(AvgLong.java:66)
      	at org.apache.tajo.engine.eval.AggregationFunctionCallEval.merge(AggregationFunctionCallEval.java:59)
      	at org.apache.tajo.engine.planner.physical.SortAggregateExec.next(SortAggregateExec.java:77)
      	at org.apache.tajo.engine.planner.physical.DistinctGroupbySortAggregationExec.next(DistinctGroupbySortAggregationExec.java:88)
      	at org.apache.tajo.engine.planner.physical.StoreTableExec.next(StoreTableExec.java:77)
      	at org.apache.tajo.worker.Task.run(Task.java:382)
      	at org.apache.tajo.worker.TaskRunner$1.run(TaskRunner.java:406)
      	at java.lang.Thread.run(Thread.java:744)
      

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            • Assignee:
              hjkim Hyoungjun Kim
              Reporter:
              hjkim Hyoungjun Kim
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              Dates

              • Created:
                Updated:
                Resolved: