@Test
  public void testFilterDecimalColGreaterEqualCol() throws HiveException {
    VectorizedRowBatch b = getVectorizedRowBatch2DecimalCol();
    VectorExpression expr = new FilterDecimalColGreaterEqualDecimalColumn(0, 1);
    expr.evaluate(b);

    // check that right row(s) are selected
    assertTrue(b.selectedInUse);
    assertEquals(0, b.selected[0]);
    assertEquals(1, b.selected[1]);
    assertEquals(2, b.size);
  }
Spot check col >= col for decimal.
ql/src/test/org/apache/hadoop/hive/ql/exec/vector/expressions/TestVectorFilterExpressions.java