#coding:utf-8

"""
ID:          issue-5703
ISSUE:       https://github.com/FirebirdSQL/firebird/issues/5703
TITLE:       Support for DROP IDENTITY clause
DESCRIPTION:
JIRA:        CORE-5431
FBTEST:      bugs.core_5431
NOTES:
    [23.02.2023] pzotov
    Adjusted expected_stderr according to notes in #7229. Removed unneeded substitutions and old comments.
    Confirmed problem on 5.0.0.573
    Checked on 5.0.0.958, 4.0.3.2903 - all OK.
"""

import pytest
from firebird.qa import *

db = db_factory()

test_script = """
    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 error:
    insert into test1 default values returning id as test1_id;
"""

act = isql_act('db', test_script)

expected_stdout = """
    IDENTITY_SEQUENCES_COUNT_1      1
    TEST1_ID                        32767
    IDENTITY_SEQUENCES_COUNT_2      0
"""
expected_stderr = """
    Statement failed, SQLSTATE = 23000
    validation error for column "TEST1"."ID", value "*** null ***"
"""

@pytest.mark.version('>=4.0')
def test_1(act: Action):
    act.expected_stdout = expected_stdout
    act.expected_stderr = expected_stderr
    act.execute()
    assert (act.clean_stderr == act.clean_expected_stderr and
            act.clean_stdout == act.clean_expected_stdout)