#coding:utf-8

"""
ID:          issue-1639
ISSUE:       1639
TITLE:       Wrong SELECT query results using index to evaluate >= condition
DESCRIPTION:
JIRA:        CORE-1215
FBTEST:      bugs.core_1215
"""

import pytest
from firebird.qa import *

init_script = """CREATE TABLE T (ID INT);
COMMIT;

set term ^;

EXECUTE BLOCK AS
DECLARE I INT = 0;
BEGIN
  WHILE (I < 50000) DO
  BEGIN
    INSERT INTO T VALUES (1);
    I = I + 1;
  END
END^

set term ;^
commit;

CREATE INDEX IDX_T ON T (ID);
COMMIT;
"""

db = db_factory(init=init_script)

test_script = """set plan on;
SELECT COUNT(*) FROM T ;
SELECT COUNT(*) FROM T WHERE ID >= 1 ;
SELECT COUNT(*) FROM T WHERE ID = 1 ;
SELECT COUNT(*) FROM T WHERE ID <= 1 ;
"""

act = isql_act('db', test_script)

expected_stdout = """PLAN (T NATURAL)

                COUNT
=====================
                50000

PLAN (T INDEX (IDX_T))

                COUNT
=====================
                50000

PLAN (T INDEX (IDX_T))

                COUNT
=====================
                50000

PLAN (T INDEX (IDX_T))

                COUNT
=====================
                50000

"""

@pytest.mark.version('>=3.0')
def test_1(act: Action):
    act.expected_stdout = expected_stdout
    act.execute()
    assert act.clean_stdout == act.clean_expected_stdout