text: #coding:utf-8
  #
  # id:           bugs.core_2678
  # title:        Full outer join cannot use available indices (very slow execution)
  # decription:   
  # tracker_id:   CORE-2678
  # min_versions: ['3.0']
  # versions:     3.0
  # qmid:         None
  
  import pytest
  from firebird.qa import db_factory, isql_act, Action
  
  # version: 3.0
  # resources: None
  
  substitutions_1 = []
  
  init_script_1 = """"""
  
  db_1 = db_factory(sql_dialect=3, init=init_script_1)
  
  test_script_1 = """
      create table td_data1 (
        c1 varchar(20) character set win1251 not null collate win1251,
        c2 integer not null,
        c3 date not null,
        d1 float not null
      );
      create index idx_td_data1 on td_data1(c1,c2,c3);
      commit;
      
      create table td_data2 (
        c1 varchar(20) character set win1251 not null collate win1251,
        c2 integer not null,
        c3 date not null,
        d2 float not null
      );
      create index idx_td_data2 on td_data2(c1,c2,c3);
      commit;
      
      set planonly;
      select
          d1.c1, d2.c1,
          d1.c2, d2.c2,
          d1.c3, d2.c3,
          coalesce(sum(d1.d1), 0) t1,
          coalesce(sum(d2.d2), 0) t2
      from td_data1 d1
      full join td_data2 d2
          on
              d2.c1 = d1.c1
              and d2.c2 = d1.c2
              and d2.c3 = d1.c3
      group by
          d1.c1, d2.c1,
          d1.c2, d2.c2,
          d1.c3, d2.c3;
  """
  
  act_1 = isql_act('db_1', test_script_1, substitutions=substitutions_1)
  
  expected_stdout_1 = """
      PLAN SORT (JOIN (JOIN (D2 NATURAL, D1 INDEX (IDX_TD_DATA1)), JOIN (D1 NATURAL, D2 INDEX (IDX_TD_DATA2))))
  """
  
  @pytest.mark.version('>=3.0')
  def test_1(act_1: Action):
      act_1.expected_stdout = expected_stdout_1
      act_1.execute()
      assert act_1.clean_stdout == act_1.clean_expected_stdout
  
  