#coding:utf-8 """ ID: issue-8252 ISSUE: https://github.com/FirebirdSQL/firebird/issues/8252 TITLE: Incorrect subquery unnesting with complex dependencies (SubQueryConversion = true) DESCRIPTION: NOTES: [14.09.2024] pzotov 1. 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. 2. Custom driver config object is created here for using 'SubQueryConversion = true'. 3. Additional test was made for this issue: tests/functional/tabloid/test_aae2ae32.py Confirmed bug on 5.0.2.1497. Checked on 5.0.2.1499-5fa4ae6. """ import pytest from firebird.qa import * from firebird.driver import driver_config, connect, NetProtocol db = db_factory() act = python_act('db', substitutions = [ ('[ \t]+',' ') ]) test_sql = """ select /* TRACE_ME */ first 5 1 x from sales s where exists ( select 1 from customer c where s.cust_no = c.cust_no and ( s.cust_no = c.cust_no or s.cust_no = c.cust_no ) ); """ #----------------------------------------------------------- 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): srv_cfg = driver_config.register_server(name = 'test_srv_gh_8252', config = '') db_cfg_name = f'db_cfg_8252' db_cfg_object = driver_config.register_database(name = db_cfg_name) db_cfg_object.server.value = srv_cfg.name db_cfg_object.database.value = 'employee' db_cfg_object.config.value = f""" SubQueryConversion = true """ 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$config_name = 'SubQueryConversion'") for r in cur: print(r[0],r[1]) ps = cur.prepare(test_sql) print( '\n'.join([replace_leading(s) for s in ps.detailed_plan.split('\n')]) ) for r in cur.execute(ps): print(r[0]) con.rollback() act.expected_stdout = """ SubQueryConversion true Sub-query ....-> Filter ........-> Table "CUSTOMER" as "C" Access By ID ............-> Bitmap ................-> Index "RDB$PRIMARY22" Unique Scan Select Expression ....-> First N Records ........-> Filter ............-> Table "SALES" as "S" Full Scan 1 1 1 1 1 """ act.stdout = capsys.readouterr().out assert act.clean_stdout == act.clean_expected_stdout