@Override
  public String getName() {
    return FUNCTION_NAME;
  }
@Test
  public void testRoundDecimalNullLiteral() {
    ExpressionContext expression =
        RequestContextUtils.getExpression(String.format("round_decimal(null)", INT_SV_COLUMN));
    TransformFunction transformFunction = TransformFunctionFactory.get(expression, _dataSourceMap);
    Assert.assertTrue(transformFunction instanceof RoundDecimalTransformFunction);
    Assert.assertEquals(transformFunction.getName(), TransformFunctionType.ROUND_DECIMAL.getName());
    double[] expectedValues = new double[NUM_ROWS];
    RoaringBitmap roaringBitmap = new RoaringBitmap();
    roaringBitmap.add(0L, NUM_ROWS);
    testTransformFunctionWithNull(transformFunction, expectedValues, roaringBitmap);
  }