mirror of
https://github.com/FirebirdSQL/firebird-qa.git
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99 lines
3.1 KiB
Python
99 lines
3.1 KiB
Python
#coding:utf-8
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"""
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ID: issue-8231
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ISSUE: https://github.com/FirebirdSQL/firebird/issues/8231
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TITLE: SubQueryConversion = true --request size limit exceeded / Unsuccessful execution caused by an unavailable resource. unable to allocate memory from operating system
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DESCRIPTION:
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NOTES:
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[26.08.2024] pzotov
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Two tables must be joined by columns which has different charset or collates.
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Confirmed bug on 5.0.2.1484-3cdfd38 (25.08.2024), got:
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Statement failed, SQLSTATE = HY000
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request size limit exceeded
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Checked on 5.0.2.1485-274af35 -- all ok.
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Thanks to dimitr for the advice on implementing the test.
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"""
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import pytest
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from firebird.qa import *
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from firebird.driver import driver_config, connect
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init_script = """
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create table t1(fld varchar(10) character set win1252);
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create table t2(fld varchar(10) character set utf8);
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insert into t1(fld) values('Ð');
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insert into t2(fld) values('Ð');
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commit;
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"""
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db = db_factory(init=init_script)
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act = python_act('db')
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#-----------------------------------------------------------
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def replace_leading(source, char="."):
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stripped = source.lstrip()
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return char * (len(source) - len(stripped)) + stripped
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#-----------------------------------------------------------
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@pytest.mark.version('>=5.0.2,<6')
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def test_1(act: Action, capsys):
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test_sql = """
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select 1 as x
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from t1
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where exists (select 1 from t2 where t1.fld = t2.fld)
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"""
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for sq_conv in ('true','false',):
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srv_cfg = driver_config.register_server(name = f'srv_cfg_8231_{sq_conv}', config = '')
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db_cfg_name = f'db_cfg_8231_{sq_conv}'
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db_cfg_object = driver_config.register_database(name = db_cfg_name)
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db_cfg_object.server.value = srv_cfg.name
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db_cfg_object.database.value = str(act.db.db_path)
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db_cfg_object.config.value = f"""
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SubQueryConversion = {sq_conv}
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"""
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with connect(db_cfg_name, user = act.db.user, password = act.db.password) as con:
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cur = con.cursor()
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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'")
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for r in cur:
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print(r[0],r[1])
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ps = cur.prepare(test_sql)
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# Print explained plan with padding eash line by dots in order to see indentations:
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print( '\n'.join([replace_leading(s) for s in ps.detailed_plan.split('\n')]) )
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# Print data:
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for r in cur.execute(ps):
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print(r[0])
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con.rollback()
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act.expected_stdout = f"""
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SubQueryConversion true
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Select Expression
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....-> Nested Loop Join (semi)
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........-> Table "T1" Full Scan
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........-> Filter
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............-> Table "T2" Full Scan
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1
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SubQueryConversion false
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Sub-query
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....-> Filter
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........-> Table "T2" Full Scan
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Select Expression
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....-> Filter
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........-> Table "T1" Full Scan
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1
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"""
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act.stdout = capsys.readouterr().out
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assert act.clean_stdout == act.clean_expected_stdout
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