@Test
public void testAddExpr() throws JSQLParserException {

	Select select = (Select) CCJSqlParserUtil.parse("select a from mytable");
	SelectUtils.addExpression(select, new Column("b"));
	assertEquals("SELECT a, b FROM mytable", select.toString());
	
	Addition add = new Addition();
	add.setLeftExpression(new LongValue(5));
	add.setRightExpression(new LongValue(6));
	SelectUtils.addExpression(select, add);
	
	assertEquals("SELECT a, b, 5 + 6 FROM mytable", select.toString());
}