public PqlTest() {}
@Before
public void setUp() throws Exception {
column1 = new ColumnType();
column1.setLabelName("column1");
column2 = new ColumnType();
column2.setLabelName("column2");
column3 = new ColumnType();
column3.setLabelName("column3");
textValue1 = new TextValue();
textValue1.setValue("value1");