firebird-qa/tests/bugs/core_1812_test.py

#coding:utf-8
#
# id:           bugs.core_1812
# title:        Index is not used for some date/time expressions in dialect 1
# decription:   
#                   02.02.2019. Added separate code for FB 4.0: statements like SELECT TIMESTAMP 'now' FROM RDB$DATABASE;
#                   -- can not be used anymore (Statement failed, SQLSTATE = 22018 / conversion error from string "now").
#                   Details about timezone datatype see in: doc\\sql.extensions\\README.time_zone.md
#                
# tracker_id:   CORE-1812
# min_versions: []
# versions:     2.5.0, 4.0
# qmid:         bugs.core_1812

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

# version: 2.5.0
# resources: None

substitutions_1 = []

init_script_1 = """
    create table t (col timestamp) ;
    create index it on t (col) ;
    commit ;
  """

db_1 = db_factory(sql_dialect=1, init=init_script_1)

test_script_1 = """
    SET PLAN ON;
    select * from t where col > timestamp 'now' - 7 ;
    select * from t where col > 'now' - 7 ;
"""

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

expected_stdout_1 = """
    PLAN (T INDEX (IT))
    PLAN (T INDEX (IT))
"""

@pytest.mark.version('>=2.5.0,<4.0')
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

# version: 4.0
# resources: None

substitutions_2 = []

init_script_2 = """"""

db_2 = db_factory(sql_dialect=1, init=init_script_2)

test_script_2 = """
    create table test (dts timestamp) ;
    commit;
    insert into test
    select dateadd( rand() * 10 second to localtimestamp )
    from rdb$types, rdb$types;
    commit;
    create index test_dts on test(dts);
    commit;

    set planonly;
    select * from test where dts = localtimestamp;
    select * from test where dts = current_timestamp;
"""

act_2 = isql_act('db_2', test_script_2, substitutions=substitutions_2)

expected_stdout_2 = """
    PLAN (TEST INDEX (TEST_DTS))
    PLAN (TEST NATURAL)
"""

@pytest.mark.version('>=4.0')
def test_2(act_2: Action):
    act_2.expected_stdout = expected_stdout_2
    act_2.execute()
    assert act_2.clean_stdout == act_2.clean_expected_stdout