Added/Updated tests\bugs\gh_8225_test.py: Checked on 5.0.2.1482-604555f. NOT: parameter 'SubQueryConversion' currently presents only in FB 5.x and _NOT_ in FB 6.x.

tests/bugs/gh_8225_test.py

@@ -0,0 +1,110 @@
+#coding:utf-8
+
+"""
+ID:          issue-8225
+ISSUE:       https://github.com/FirebirdSQL/firebird/issues/8225
+TITLE:       Problematic queries when SubQueryConversion = true
+DESCRIPTION:
+NOTES:
+    [23.08.2024] pzotov
+    1. Explained plan output temporary disabled: there is question about missed(?) indentation after 'Refetch'.
+       Sent letter to dimitr, 23.08.2024 21:42.
+    2. Parameter 'SubQueryConversion' currently presents only in FB 5.x and _NOT_ in FB 6.x.
+       Because of that, testing version are limited only for 5.0.2. FB 6.x currently is NOT tested.
+
+    Confirmed bug on 5.0.2.1479-adfe97a.
+    Checked on 5.0.2.1482-604555f.
+"""
+
+import pytest
+from firebird.qa import *
+from firebird.driver import driver_config, connect
+
+init_script = """
+    create domain dm_emp_id smallint;
+    create domain dm_dep_id smallint;
+    create domain dm_name varchar(20);
+
+    create table department (
+         dept_no dm_dep_id not null
+        ,dept_name dm_name not null
+    );
+
+    create table employee (
+        emp_no dm_emp_id not null
+        ,last_name dm_name not null
+        ,dept_no dm_dep_id not null
+        ,constraint emp_key primary key (emp_no)
+    );
+    commit;
+    insert into department( dept_no, dept_name) values (1, 'd1');
+    insert into department( dept_no, dept_name) values (2, 'd2');
+    insert into department( dept_no, dept_name) values (3, 'd3');
+    insert into employee( emp_no, last_name, dept_no) values (1, 'e1', 1);
+    insert into employee( emp_no, last_name, dept_no) values (2, 'e2', 2);
+    insert into employee( emp_no, last_name, dept_no) values (3, 'e3', 3);
+    insert into employee( emp_no, last_name, dept_no) values (4, 'e4', 1);
+    insert into employee( emp_no, last_name, dept_no) values (5, 'e5', 1);
+    insert into employee( emp_no, last_name, dept_no) values (6, 'e6', 1);
+    insert into employee( emp_no, last_name, dept_no) values (7, 'e7', 2);
+    insert into employee( emp_no, last_name, dept_no) values (8, 'e8', 3);
+    insert into employee( emp_no, last_name, dept_no) values (9, 'e9', 3);
+    commit;
+
+    update department d set dept_no = -dept_no where exists(select * from employee e where e.dept_no = d.dept_no) rows 1;
+    insert into employee( emp_no, last_name, dept_no) values (12, 'e12', -(select max(dept_no)+1 from department) );
+    commit;
+"""
+
+db = db_factory(init=init_script)
+
+act = python_act('db')
+
+#-----------------------------------------------------------
+
+def replace_leading(source, char="."):
+    stripped = source.lstrip()
+    return char * (len(source) - len(stripped)) + stripped
+
+#-----------------------------------------------------------
+
+@pytest.mark.version('>=5.0.2,<6')
+def test_1(act: Action, capsys):
+
+    test_sql = """
+        select d.dept_no, d.dept_name from department d
+        where exists(select * from employee e where e.dept_no = d.dept_no)
+        order by dept_no rows 1
+    """
+
+    for sq_conv in ('true','false',):
+        srv_cfg = driver_config.register_server(name = f'srv_cfg_8225_{sq_conv}', config = '')
+        db_cfg_name = f'db_cfg_8225_{sq_conv}'
+        db_cfg_object = driver_config.register_database(name = db_cfg_name)
+        db_cfg_object.server.value = srv_cfg.name
+        db_cfg_object.database.value = str(act.db.db_path)
+        db_cfg_object.config.value = f"""
+            SubQueryConversion = {sq_conv}
+        """
+
+        with connect(db_cfg_name, user = act.db.user, password = act.db.password) as con:
+            cur = con.cursor()
+            cur.execute("select g.rdb$config_name, g.rdb$config_value from rdb$database r left join rdb$config g on g.rdb$config_name = 'SubQueryConversion'")
+            for r in cur:
+                print(r[0],r[1])
+
+            ps = cur.prepare(test_sql)
+            # temporary, until question with indentation will be solved by dimitr -- print( '\n'.join([replace_leading(s) for s in ps.detailed_plan.split('\n')]) )
+            for r in cur.execute(ps):
+                print(r[0],r[1])
+            con.rollback()
+
+    act.expected_stdout = f"""
+        SubQueryConversion true
+        2 d2
+        SubQueryConversion false
+        2 d2
+    """
+    act.stdout = capsys.readouterr().out
+    assert act.clean_stdout == act.clean_expected_stdout
+