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  1. Calcite
  2. CALCITE-580

Average aggregation on an Integer column throws java.lang.ClassCastException

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.1.0-incubating
    • Component/s: None
    • Labels:
      None

      Description

      There are 2 Integer columns: a, c in table abc.

      While running the following sql, it throw the ClassCastException:
      select a, avg(c) as agg from abc group by a

      Exception in thread "main" java.lang.ClassCastException: java.lang.Long incompatible with java.lang.Integer
      at org.apache.calcite.avatica.util.AbstractCursor$IntAccessor.getInt(AbstractCursor.java:460)
      at org.apache.calcite.avatica.AvaticaResultSet.getInt(AvaticaResultSet.java:311)

      The generated code that I think causing the issue, it try to cast the result to long.
      public Object current() {
      final Object[] current = (Object[]) inputEnumerator.current();
      return new Object[]

      { current[0], (long) org.apache.calcite.runtime.SqlFunctions.toInt(current[1]) / org.apache.calcite.runtime.SqlFunctions.toLong(current[2])}

      ;
      }

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            • Assignee:
              julianhyde Julian Hyde
              Reporter:
              chinwei Low Chin Wei
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              • Created:
                Updated:
                Resolved: