@Test
  public void testCompareOperations() {
    String[] expectedHeader =
        new String[] {
          "_col0", "_col1", "_col2", "_col3", "_col4", "_col5",
        };
    String[] retArray =
        new String[] {
          "null,null,null,null,null,null,",
          "null,null,null,null,null,null,",
          "null,null,null,null,null,null,",
        };
    tableResultSetEqualTest(
        "select s1=s2, s1>s2, s1<s2, s5 like 'test' , s2 in (1,2), s2 between 1 and 3 from sg1",
        expectedHeader,
        retArray,
        DATABASE_NAME);
  }
CompareOperations: =, >, <, like, in, between...(don't include `is null`)

<p>The result will be NULL if any Operand of CompareOperations is NULL.
integration-test/src/test/java/org/apache/iotdb/relational/it/query/old/query/IoTDBNullOperandTableIT.java