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Added/Updated tests\bugs\gh_7993_test.py: Checked on 6.0.0.249. NB: 5.x is also affected and it looks a regression since 5.0.0.1292

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pavel-zotov 2024-02-06 09:36:19 +03:00
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#coding:utf-8
"""
ID: issue-7993
ISSUE: https://github.com/FirebirdSQL/firebird/issues/7993
TITLE: Unexpected results when using CASE WHEN with RIGHT JOIN
NOTES:
[06.02.2024] pzotov
Confirmed bug on 6.0.0.247
Checked on 6.0.0.249 -- all OK.
NB: 5.x is also affected and it looks a regression since 5.0.0.1292 (date of build: 04-dec-2023)
"""
import pytest
from firebird.qa import *
db = db_factory()
test_script = """
recreate table t0(c0 boolean);
recreate table t1(c1 boolean);
insert into t0 (c0) values (true);
insert into t1 (c1) values (false);
set count on;
set list on;
select t1.c1 as q1_c1, t0.c0 as q1_c0 from t1 right join t0 on t0.c0; -- false true
select t1.c1 as q2_c1, t0.c0 as q2_c0 from t1 right join t0 on t0.c0 where (case t1.c1 when t1.c1 then null else true end); -- null true (unexpected)
select (case t1.c1 when t1.c1 then null else true end ) as q3_result from t1 right join t0 on t0.c0; -- null
"""
act = isql_act('db', test_script, substitutions = [('[ \t]+', ' ')])
expected_stdout = """
Q1_C1 <false>
Q1_C0 <true>
Records affected: 1
Records affected: 0
Q3_RESULT <null>
Records affected: 1
"""
@pytest.mark.version('>=6.0')
def test_1(act: Action):
act.expected_stdout = expected_stdout
act.execute(combine_output = True)
assert act.clean_stdout == act.clean_expected_stdout