Examples of org.apache.hadoop.hive.ql.udf.generic.GenericUDFDateSub.evaluate()

    udf.initialize(arguments);
    DeferredObject valueObj1 = new DeferredJavaObject(new TimestampWritable(new Timestamp(109, 06,
        20, 4, 17, 52, 0)));
    DeferredObject valueObj2 = new DeferredJavaObject(new Integer("3"));
    DeferredObject[] args = {valueObj1, valueObj2};
    Text output = (Text) udf.evaluate(args);


    assertEquals("date_sub() test for TIMESTAMP failed ", "2009-07-17", output.toString());


    // Test with null args
    args = new DeferredObject[] { new DeferredJavaObject(null), valueObj2 };


    assertEquals("date_sub() test for TIMESTAMP failed ", "2009-07-17", output.toString());


    // Test with null args
    args = new DeferredObject[] { new DeferredJavaObject(null), valueObj2 };
    assertNull("date_add() 1st arg null", udf.evaluate(args));


    args = new DeferredObject[] { valueObj1, new DeferredJavaObject(null) };
    assertNull("date_add() 2nd arg null", udf.evaluate(args));


    args = new DeferredObject[] { new DeferredJavaObject(null), new DeferredJavaObject(null) };

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