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83 lines
2.2 KiB
Python
83 lines
2.2 KiB
Python
#coding:utf-8
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#
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# id: bugs.core_1482
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# title: Make optimizer to consider ORDER BY optimization when making decision about join order
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# decription:
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# tracker_id: CORE-1482
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# min_versions: ['3.0']
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# versions: 3.0
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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: 3.0
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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(page_size=4096, sql_dialect=3, init=init_script_1)
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test_script_1 = """
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recreate table tcolor(id int , name varchar(20) );
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recreate table thorses(id int, color_id int, name varchar(20));
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commit;
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set term ^;
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execute block as
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declare i int;
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declare n_main int = 50;
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declare ratio int = 1000;
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begin
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i = 0;
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while (i < n_main) do
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begin
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i = i + 1;
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insert into tcolor(id, name)
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values (:i, 'color #' || :i);
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end
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i = 0;
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while (i < n_main * ratio) do
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begin
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i = i + 1;
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insert into thorses(id, color_id, name)
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values (:i, mod(:i, :n_main)+1, 'horse #' || :i);
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end
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end
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^
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set term ;^
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commit;
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create index tcolor_id on tcolor(id);
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create index thorses_color_id on thorses(color_id);
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-- this index was forgotten in previous revisions:
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create index thorses_id on thorses(id);
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commit;
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set list on;
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select (select count(*) from tcolor) colors_cnt, (select count(*) from thorses) horses_cnt
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from rdb$database;
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set planonly;
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-- in 2.1 and 2.5: PLAN SORT (JOIN (M NATURAL, D INDEX (THORSES_COLOR_ID))) -- doesn`t see 'rows 1'
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-- in 3.0 plan should CHANGE and take in account 'rows N' limit:
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select * from tcolor m join thorses d on m.id = d.color_id order by d.id rows 1;
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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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COLORS_CNT 50
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HORSES_CNT 50000
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PLAN JOIN (D ORDER THORSES_ID, M INDEX (TCOLOR_ID))
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"""
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@pytest.mark.version('>=3.0')
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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_expected_stdout == act_1.clean_stdout
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