#coding:utf-8

"""
ID:          issue-3811
ISSUE:       3811
TITLE:       Inefficient optimization (regression)
DESCRIPTION:
NOTES:
  It seems that we have regression in current 4.0 snapshots (elapsed time more than 10x comparing with 2.5).
  Also, 4.0 has different plan comparing with 3.0.
  After discuss with dimitr it was decided to commit this test into fbt-repo in order to have constant
  reminder about this issue.
  Currently this test should FAIL on 4.0!
JIRA:        CORE-3450
FBTEST:      bugs.core_3450
"""

import pytest
from firebird.qa import *

db = db_factory()

test_script = """
    create or alter procedure sp_2 as begin end;

    recreate table test_1 (f1 int, f2 int, f3 int);
    create index test_1_f1 on test_1(f1);
    create index test_1_f2 on test_1(f2);
    commit;

    recreate table test_2 (f1 int, f2 int);
    create index test_2_f1 on test_2(f1);
    create index test_2_f2 on test_2(f2);
    commit;

    recreate table test_3 (f1 int);
    create index test_3_f1 on test_3(f1);
    commit;

    set term ^;
    create or alter procedure sp_1 returns (f1 int)
    as begin
      f1=1;
      suspend;
    end
    ^

    create or alter procedure sp_2 as
      declare i int;
      declare t1_lim int = 1000;
      declare t2_lim int = 100;
      declare t3_lim int = 10;
    begin
      i=0;
      while (i<t1_lim) do begin
        i=i+1;
        insert into test_1 values (:i, 1, 3);
      end

      i=0;
      while (i<t2_lim) do begin
        i=i+1;
        insert into test_2 values (:i, 2);
      end

      i=0;
      while (i<t3_lim) do begin
        i=i+1;
        insert into test_3 values (3);
      end
    end
    ^
    set term ;^
    commit;

    execute procedure sp_2;
    commit;

    set statistics index test_1_f1;
    set statistics index test_1_f2;
    set statistics index test_2_f1;
    set statistics index test_2_f2;
    set statistics index test_3_f1;
    commit;

    set planonly;

    select t2.f1
    from test_2 t2
    join test_1 t1 on t1.f1=t2.f1
    join sp_1 p1 on p1.f1=t1.f2
    join test_3 t3 on t3.f1=t1.f3
    where t2.f2=2
    ;
"""

act = isql_act('db', test_script)

expected_stdout = """
    PLAN JOIN (JOIN (P1 NATURAL, T1 INDEX (TEST_1_F2)), T2 INDEX (TEST_2_F1), T3 INDEX (TEST_3_F1))
"""

@pytest.mark.version('>=3.0')
def test_1(act: Action):
    if act.is_version('>=4'):
        pytest.skip("See test NOTES")
    act.expected_stdout = expected_stdout
    act.execute()
    assert act.clean_stdout == act.clean_expected_stdout