mirror of
https://github.com/FirebirdSQL/firebird-qa.git
synced 2025-01-22 21:43:06 +01:00
56 lines
1.6 KiB
Python
56 lines
1.6 KiB
Python
#coding:utf-8
|
|
|
|
"""
|
|
ID: tabloid.optimizer-index-navigation
|
|
TITLE: Check that optimizer takes in account presense of index and does navigation instead of external sort.
|
|
DESCRIPTION:
|
|
Verified commit: https://github.com/FirebirdSQL/firebird/actions/runs/176006556
|
|
Source message to dimitr: 20.07.2020 20:00.
|
|
|
|
Checked on 3.0.7.33340 and 4.0.0.2114 (intermediate build with timestamp 20.07.2020 17:45)
|
|
FBTEST: functional.tabloid.optimizer_index_navigation
|
|
"""
|
|
|
|
import pytest
|
|
from firebird.qa import *
|
|
|
|
db = db_factory()
|
|
|
|
test_script = """
|
|
recreate table t(x int);
|
|
create index t_x_asc on t(x);
|
|
create descending index t_x_dec on t(x);
|
|
insert into t select rand()*1000 from rdb$types,rdb$types;
|
|
commit;
|
|
set statistics index t_x_asc;
|
|
set statistics index t_x_dec;
|
|
commit;
|
|
set planonly;
|
|
|
|
select * from t as t1 where x>=0.5; -- NO 'plan order' must be here; bitmap is enough!
|
|
|
|
select * from t as t2 where x>=0.5 order by x; -- here PLAN ORDER is much efficient than bitmap + PLAN SORT
|
|
|
|
select * from t as t3 where x<=0.5; -- NO 'plan order' must be here; bitmap is enough!
|
|
|
|
select * from t as t4 where x<=0.5 order by x desc; -- here PLAN ORDER is much efficient than bitmap + PLAN SORT
|
|
"""
|
|
|
|
act = isql_act('db', test_script)
|
|
|
|
expected_stdout = """
|
|
PLAN (T1 INDEX (T_X_ASC))
|
|
|
|
PLAN (T2 ORDER T_X_ASC)
|
|
|
|
PLAN (T3 INDEX (T_X_ASC))
|
|
|
|
PLAN (T4 ORDER T_X_DEC)
|
|
"""
|
|
|
|
@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
|