#coding:utf-8

"""
ID:          issue-478
ISSUE:       478
TITLE:       Left joining views with null fails
DESCRIPTION:
JIRA:        CORE-149
FBTEST:      bugs.core_0149
"""

import pytest
from firebird.qa import *

db = db_factory()

test_script = """
    set list on;

    -- Initial comment by johnsparrowuk, 19/Mar/04 12:00 AM:
    recreate view currentpeople(k) as select 1 as k from rdb$database;
    recreate view finishedpeople(k) as select 1 as k from rdb$database;
    commit;

    recreate table mytable (
        person varchar(20) not null,
        status int not null, primary key (person,status)
    );

    recreate view currentpeople(person) as
    select distinct person as person
    from mytable where status = 1;

    recreate view finishedpeople(person) as
    select distinct person as person
    from mytable where status = 2;

    insert into mytable values ('john',1);
    insert into mytable values ('john',2);
    insert into mytable values ('fred',1);
    commit;

    -- This works fine: fred-null, john-john
    select *
    from currentpeople c
    left join finishedpeople f on c.person = f.person
    order by c.person, f.person
    ;

    -- This is as expected too: john-john
    select *
    from currentpeople c
    left join finishedpeople f
    on c.person = f.person where f.person = 'john'
    order by c.person, f.person
    ;

    -- WHATS HAPPENING HERE????? fred-null, JOHN-NULL where does the john-null come from???
    select *
    from currentpeople c
    left join finishedpeople f on c.person = f.person
    where f.person is null
    order by c.person, f.person
    ;
    commit;

    --#################################################

    -- Alice F. Bird added a comment - 14/Jun/06 09:32 AM
    recreate table test (
        id int not null,
        name varchar(15),
        pid integer
    );

    insert into test(id, name, pid) values(1, 'Car',    null);
    insert into test(id, name, pid) values(2, 'Engine',    1);
    insert into test(id, name, pid) values(3, 'Body',      1);
    insert into test(id, name, pid) values(4, 'Oil Filter',2);
    insert into test(id, name, pid) values(5, 'Air Filter',2);
    insert into test(id, name, pid) values(6, 'Door Left', 3);
    insert into test(id, name, pid) values(7, 'Door Right',3);
    commit;

    -- This query issued WRONG result on 1.5.6
    -- (because first data source - 'TEST' - has not alias)
    select *
    from test
      left outer join test t2
        on test.pid=t2.id
    order by test.id, t2.id
    ;

    -- This works fine:
    select *
    from test t1
      left outer join test t2
        on t1.pid=t2.id
    order by t1.id, t2.id
    ;
"""

act = isql_act('db', test_script)

expected_stdout = """
    PERSON                          fred
    PERSON                          <null>

    PERSON                          john
    PERSON                          john



    PERSON                          john
    PERSON                          john



    PERSON                          fred
    PERSON                          <null>



    ID                              1
    NAME                            Car
    PID                             <null>
    ID                              <null>
    NAME                            <null>
    PID                             <null>

    ID                              2
    NAME                            Engine
    PID                             1
    ID                              1
    NAME                            Car
    PID                             <null>

    ID                              3
    NAME                            Body
    PID                             1
    ID                              1
    NAME                            Car
    PID                             <null>

    ID                              4
    NAME                            Oil Filter
    PID                             2
    ID                              2
    NAME                            Engine
    PID                             1

    ID                              5
    NAME                            Air Filter
    PID                             2
    ID                              2
    NAME                            Engine
    PID                             1

    ID                              6
    NAME                            Door Left
    PID                             3
    ID                              3
    NAME                            Body
    PID                             1

    ID                              7
    NAME                            Door Right
    PID                             3
    ID                              3
    NAME                            Body
    PID                             1



    ID                              1
    NAME                            Car
    PID                             <null>
    ID                              <null>
    NAME                            <null>
    PID                             <null>

    ID                              2
    NAME                            Engine
    PID                             1
    ID                              1
    NAME                            Car
    PID                             <null>

    ID                              3
    NAME                            Body
    PID                             1
    ID                              1
    NAME                            Car
    PID                             <null>

    ID                              4
    NAME                            Oil Filter
    PID                             2
    ID                              2
    NAME                            Engine
    PID                             1

    ID                              5
    NAME                            Air Filter
    PID                             2
    ID                              2
    NAME                            Engine
    PID                             1

    ID                              6
    NAME                            Door Left
    PID                             3
    ID                              3
    NAME                            Body
    PID                             1

    ID                              7
    NAME                            Door Right
    PID                             3
    ID                              3
    NAME                            Body
    PID                             1
"""

@pytest.mark.version('>=3')
def test_1(act: Action):
    act.expected_stdout = expected_stdout
    act.execute()
    assert act.clean_stdout == act.clean_expected_stdout