@Test
public void testRewordAlterColumnTypeNull() throws Exception {

	Assert.assertEquals(
		"alter table DLFolder alter column userName set data type " +
			"varchar(75);\n",
		buildSQL("alter_column_type DLFolder userName VARCHAR(75) null;"));
	Assert.assertEquals(
		"alter table DLFolder alter column userName drop not null;",
		_nullableAlter);
}