Assert.assertEquals(2, visitor.getColumns().size());
Assert.assertEquals(true, visitor.getColumns().contains(new Column("emp", "salary")));
Assert.assertEquals(true, visitor.getColumns().contains(new Column("emp", "F1")));
StringBuilder buf = new StringBuilder();
OracleOutputVisitor outputVisitor = new OracleOutputVisitor(buf);
stmt.accept(outputVisitor);
Assert.assertEquals("SELECT MAX(salary)\nFROM emp\nWHERE F1 = DATE '2011-10-01';\n", buf.toString());
}