#coding:utf-8
#
# id:           bugs.core_5431
# title:        Support for DROP IDENTITY clause
# decription:   
#                  Checked on 4.0.0.477
#                  18.08.2020: replaced expected_stdout, checked on 4.0.0.2164.
#                  31.08.2021: added substitution for ignore difference in BLR offset values.
#                
# tracker_id:   CORE-5431
# min_versions: ['4.0']
# versions:     4.0
# qmid:         None

import pytest
from firebird.qa import db_factory, isql_act, Action

# version: 4.0
# resources: None

substitutions_1 = [('RDB\\$[\\d]+', 'RDB'), ('.*at offset [\\d]+', 'at offset')]

init_script_1 = """"""

db_1 = db_factory(sql_dialect=3, init=init_script_1)

test_script_1 = """
    set list on;
    --set echo on;

    recreate table test1(
        id smallint generated by default as identity ( start with 32767 increment -65535 )
    );

    commit;

    -- Should be 1:
    select count(*) as identity_sequences_count_1
    from rdb$generators
    where rdb$system_flag = 6;

    insert into test1 default values returning id as test1_id;
    commit;

    alter table test1 alter column id drop identity;
    commit;

    -- Should be 0:
    select count(*) as identity_sequences_count_2
    from rdb$generators
    where rdb$system_flag = 6;

    -- Should issue
    -- Statement failed, SQLSTATE = 42000
    -- invalid request BLR at offset 47
    -- -generator RDB$nnn is not defined
    insert into test1 default values returning id as test1_id;

"""

act_1 = isql_act('db_1', test_script_1, substitutions=substitutions_1)

expected_stdout_1 = """
    IDENTITY_SEQUENCES_COUNT_1      1
    TEST1_ID                        32767
    IDENTITY_SEQUENCES_COUNT_2      0
"""
expected_stderr_1 = """
    Statement failed, SQLSTATE = 42000
    invalid request BLR at offset 47
    -generator RDB is not defined
"""

@pytest.mark.version('>=4.0')
def test_1(act_1: Action):
    act_1.expected_stdout = expected_stdout_1
    act_1.expected_stderr = expected_stderr_1
    act_1.execute()
    assert act_1.clean_stderr == act_1.clean_expected_stderr

    assert act_1.clean_stdout == act_1.clean_expected_stdout