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90 lines
2.3 KiB
Python
90 lines
2.3 KiB
Python
#coding:utf-8
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#
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# id: bugs.core_5421
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# title: Performance degradation in FB 3.0.2 compared to FB 2.5.7
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# decription:
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# Confirmed inefficient plan on 3.0.2.32644, 4.0.0.477:
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# PLAN JOIN (D ORDER C5421_TDETL_DTS, C INDEX (C5421_TMAIN_ID, C5421_TMAIN_EKEY))
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#
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# All fine on 3.0.2.32658, WI-T4.0.0.483
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#
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# tracker_id: CORE-5421
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# min_versions: ['2.5.7']
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# versions: 2.5.7
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# qmid: None
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import pytest
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from firebird.qa import db_factory, isql_act, Action
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# version: 2.5.7
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# resources: None
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substitutions_1 = []
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init_script_1 = """"""
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db_1 = db_factory(sql_dialect=3, init=init_script_1)
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test_script_1 = """
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recreate table tmain(id int, ekey int);
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recreate table tdetl(doc_id int, dts timestamp);
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set term ^;
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execute block as
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declare n int = 10000; -- 7600000;
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declare d int = 100; -- 5000;
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declare i int = 0;
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begin
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while ( i < n ) do
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begin
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insert into tdetl(doc_id, dts) values( :i, current_date-rand()*:d )
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returning :i+1 into i;
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end
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insert into tmain(id, ekey) values(0, 100);
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end^
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set term ;^
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commit;
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create index c5421_tmain_id on tmain(id);
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create index c5421_tmain_ekey on tmain(ekey);
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create index c5421_tdetl_doc_id on tdetl(doc_id);
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create descending index c5421_tdetl_dts on tdetl(dts);
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commit;
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--set width rel_name 8;
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--set width idx_name 30;
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--select ri.rdb$relation_name rel_name, ri.rdb$index_name idx_name, ri.rdb$statistics
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--from rdb$indices ri where ri.rdb$index_name starting with 'C5421';
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set list on;
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set plan on;
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--set stat on;
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set count on;
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select first 1 d.doc_id --, d.dts
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from tmain c
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join tdetl d ON d.doc_id = c.id
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where
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c.ekey = 100 and
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d.dts <= 'tomorrow'
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order by
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d.dts desc
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;
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"""
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act_1 = isql_act('db_1', test_script_1, substitutions=substitutions_1)
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expected_stdout_1 = """
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PLAN SORT (JOIN (C INDEX (C5421_TMAIN_EKEY), D INDEX (C5421_TDETL_DOC_ID)))
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DOC_ID 0
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Records affected: 1
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"""
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@pytest.mark.version('>=2.5.7')
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def test_1(act_1: Action):
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act_1.expected_stdout = expected_stdout_1
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act_1.execute()
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assert act_1.clean_stdout == act_1.clean_expected_stdout
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