@Test
  public void testStdDevLongRepeat () throws HiveException {
    testAggregateLongRepeats (
        "stddev",
        42L,
        4096,
        1024,
        (double)0);
  }
Unit test for the vectorized GROUP BY operator.
ql/src/test/org/apache/hadoop/hive/ql/exec/vector/TestVectorGroupByOperator.java