Code generated for GROUP BY inside UNION does not compile

    // fail
    @Test
    public void test0() throws SQLException {
        sql("model", "select count(*) from EMPS group by NAME union select count(*) from EMPS group by NAME").ok();
    }

    // fail
    @Test
    public void test1() throws SQLException {
        sql("model", "select sum(AGE) from EMPS group by NAME union select sum(AGE) from EMPS group by NAME").ok();
    }

    // this is ok
    @Test
    public void test2() throws SQLException {
        sql("model", "select count(*), NAME from EMPS group by NAME union select count(*), NAME from EMPS group by NAME").ok();
    }