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Added/Updated tests\bugs\core_2115_test.py: Refactored. See notes.

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pavel-zotov 2023-09-07 13:22:10 +03:00
parent a761949760
commit f5ae194cba
1 changed files with 52 additions and 12 deletions
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tests/bugs/core_2115_test.py
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@ -4,27 +4,67 @@
ID: issue-2548
ISSUE: 2548
TITLE: Query plan is missing for the long query
DESCRIPTION:
DESCRIPTION: test creates table with one index and generates query like:
select * from ... where
exists(select ...) and
exists(select ...) and
exists(select ...) and
...
-- where number of sub-queries is defined by variable SUBQRY_COUNT
Then we open cursor and ask to show execution plan (in traditional form).
Plan must have SUBQRY_COUNT lines with the same content: 'PLAN (T1 INDEX (T1_X))'
JIRA: CORE-2115
FBTEST: bugs.core_2115
NOTES:
[07.09.2023] pzotov
1. Refactored because old query did use "IN(...)" predicate with lot of literals.
This query became non-actual since IN-algorithm was changed in
https://github.com/FirebirdSQL/firebird/commit/0493422c9f729e27be0112ab60f77e753fabcb5b
("Better processing and optimization if IN <list> predicates (#7707)")
2. Although firebird-driver and firebird-qa assumes to be used under FB 3.x+, generated script
was also checked on FB 2.0.7.13318 and FB 2.1.7.18553. Both these old versions can NOT produce
any output after SUBQRY_COUNT >= 97.
3. Upper limit for SUBQRY_COUNT currently still the same: 256. After exceeding of this, we get:
"SQLSTATE = 54001 ... -Too many Contexts of Relation/Procedure/Views. Maximum allowed is 256"
"""
import pytest
from zipfile import Path
from firebird.qa import *
db = db_factory()
init_sql = """
create sequence g;
recreate table t1(
x smallint
);
commit;
insert into t1 select mod(gen_id(g,1), 256) from rdb$types,(select 1 i from rdb$types rows 10);
commit;
create index t1_x on t1(x);
commit;
"""
db = db_factory(init = init_sql)
act = python_act('db')
@pytest.mark.version('>=3.0')
def test_1(act: Action):
# Read script and expected stdout from zip file
datafile = Path(act.files_dir / 'core_2115.zip',
at='tmp_core_2115_queries_with_long_plans.sql')
act.script = datafile.read_text()
datafile = Path(act.files_dir / 'core_2115.zip',
at='tmp_core_2115_check_txt_of_long_plans.log')
act.expected_stdout = datafile.read_text()
act.execute()
def test_1(act: Action, capsys):
SUBQRY_COUNT = 256
test_sql = """
select 1 as c
from t1
where x = 0 and
"""
test_sql += '\n'.join( ( f'exists(select 1 from t1 where x = {i}) and' for i in range(SUBQRY_COUNT-1) ) )
test_sql += '\n1=1'
with act.db.connect() as con:
cur = con.cursor()
ps = cur.prepare(test_sql)
print(ps.plan)
expected_stdout = '\n'.join( ('PLAN (T1 INDEX (T1_X))' for i in range(SUBQRY_COUNT)) )
#assert '' == capsys.readouterr().out
assert act.clean_stdout == act.clean_expected_stdout