@Test
  public void testBuiltInFunction() throws Exception {
    FunctionInfo functionInfo = FunctionRegistry.getFunctionInfo("ln");
    assertTrue(functionInfo.isBuiltIn());
    assertTrue(functionInfo.isNative());
  }
Method to print out the comparison/conversion behavior for data types.
ql/src/test/org/apache/hadoop/hive/ql/exec/TestFunctionRegistry.java