#coding:utf-8

"""
ID:          issue-4453
ISSUE:       4453
TITLE:       Using COLLATE UNICODE_CI_AI in WHERE clause (not indexed) is extremely slow
DESCRIPTION:
JIRA:        CORE-4125
FBTEST:      bugs.core_4125
"""

import pytest
from firebird.qa import *

init_script = """
    create or alter view test as
    with recursive
    r as (select 0 i from rdb$database union all select r.i+1 from r where r.i<98)
    select cast(r1.i*100 + r0.i as varchar(10)) as fx
    from r r1, r r0;
    commit;
"""

db = db_factory(charset='UTF8', init=init_script)

test_script = """
    -- Checked on 2.5.1: ratio = ~105, on 2.5.2: ~132, since 2.5.3: ~1.
    set list on;
    set term ^;
    execute block returns(result varchar(50) ) as
      declare t0 timestamp;
      declare t1 timestamp;
      declare t2 timestamp;
      declare n int;
      declare r numeric(18,3);
    begin
      t0='now';
      select count(*) from test where fx collate unicode_ci like '%8%' into n;
      t1='now';
      select count(*) from test where fx collate unicode_ci_ai like '%8%' into n;
      t2='now';
      n = datediff(millisecond from t1 to t2);
      r = 1.000 * n / nullif(datediff(millisecond from t0 to t1), 0);
      if (r is null and n < 100 or r <= 5) then result = 'TIME RATIO IS OK.';
      else result = 'BAD RATIO: '||coalesce(r,' > 100 vs 0.');

      suspend;
    end
    ^
"""

act = isql_act('db', test_script)

expected_stdout = """
    RESULT                          TIME RATIO IS OK.
"""

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