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75 lines
1.9 KiB
Python
75 lines
1.9 KiB
Python
#coding:utf-8
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"""
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ID: issue-2628
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ISSUE: 2628
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TITLE: Extremely slow executing a cross join of 3 tables in Firebird 2.X
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DESCRIPTION:
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JIRA: CORE-2200
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FBTEST: bugs.core_2200
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"""
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import pytest
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from firebird.qa import *
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db = db_factory()
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test_script = """
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-- Confirmed: wrong plan on 2.0.0.12724 and 2.1.0.17798: 'T2' was choosen as drive source,
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-- absence of rows in T3 was ignored, used: PLAN JOIN (T2 NATURAL, T1 NATURAL, T3 NATURAL)
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recreate table t0(id int);
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recreate table t1(id int);
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recreate table t2(id int);
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recreate table t3(id int);
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commit;
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insert into t0 select 1 from rdb$types; -- ,rdb$types;
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commit;
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insert into t1 select * from t0;
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insert into t2 select * from t0;
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--------- ::: NB ::: we do NOT add any row to the table `t3`, it remains empty -----------
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commit;
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set list on;
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select case when count(*) > 100 then 'OK' else 'WRONG' end as t1_has_enough_rows from t1;
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select case when count(*) > 100 then 'OK' else 'WRONG' end as t2_has_enough_rows from t2;
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set plan on;
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set echo on;
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select count(*) from t1, t2, t3;
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select count(*) from t2, t3, t1;
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select count(*) from t3, t2, t1;
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"""
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act = isql_act('db', test_script)
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expected_stdout = """
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T1_HAS_ENOUGH_ROWS OK
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T2_HAS_ENOUGH_ROWS OK
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select count(*) from t1, t2, t3;
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PLAN JOIN (T3 NATURAL, T1 NATURAL, T2 NATURAL)
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COUNT 0
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select count(*) from t2, t3, t1;
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PLAN JOIN (T3 NATURAL, T2 NATURAL, T1 NATURAL)
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COUNT 0
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select count(*) from t3, t2, t1;
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PLAN JOIN (T3 NATURAL, T2 NATURAL, T1 NATURAL)
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COUNT 0
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"""
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@pytest.mark.version('>=3')
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def test_1(act: Action):
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act.expected_stdout = expected_stdout
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act.execute()
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assert act.clean_stdout == act.clean_expected_stdout
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