mirror of
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149 lines
4.6 KiB
Python
149 lines
4.6 KiB
Python
#coding:utf-8
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"""
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ID: issue-5308
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ISSUE: 5308
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TITLE: Regression: ORDER BY clause on compound index may disable usage of other indices
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DESCRIPTION:
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Plan in 3.0.0.32179 (before fix): PLAN (ZF ORDER IXA_FK__ID__KONT_ID)
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Fixed in 3.0 since: http://sourceforge.net/p/firebird/code/62570
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Checked on 2.5.5.26952 - plans are the same now.
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JIRA: CORE-5020
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FBTEST: bugs.core_5020
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NOTES:
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[17.11.2024] pzotov
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Re-implemented after https://github.com/FirebirdSQL/firebird/commit/26e64e9c08f635d55ac7a111469498b3f0c7fe81
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( Cost-based decision between ORDER and SORT plans (#8316) ).
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Execution plan was replaced with explained. Plans are splitted for versions up to 5.x and 6.x+.
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Discussed with dimitr, letters 16.11.2024.
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Checked on 6.0.0.532; 5.0.2.1567; 4.0.6.3168; 3.0.13.33794.
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"""
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import pytest
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from firebird.qa import *
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init_sql = """
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recreate table zf(
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id integer not null primary key,
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kont_id integer not null
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);
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recreate table u(
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id integer not null primary key,
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kont_id integer not null
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);
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recreate table k(
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id integer not null primary key
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);
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commit;
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insert into zf (id, kont_id) values ('1', '1');
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insert into zf (id, kont_id) values ('2', '7');
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insert into zf (id, kont_id) values ('3', '3');
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insert into zf (id, kont_id) values ('4', '5');
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insert into zf (id, kont_id) values ('5', '5');
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insert into zf (id, kont_id) values ('6', '1');
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insert into zf (id, kont_id) values ('7', '4');
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insert into zf (id, kont_id) values ('8', '2');
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insert into zf (id, kont_id) values ('9', '9');
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insert into zf (id, kont_id) values ('10', '1');
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insert into k (id) values ('1');
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insert into k (id) values ('2');
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insert into k (id) values ('3');
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insert into k (id) values ('4');
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insert into k (id) values ('5');
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insert into k (id) values ('6');
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insert into k (id) values ('7');
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insert into k (id) values ('8');
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insert into k (id) values ('9');
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insert into k (id) values ('10');
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insert into u (id, kont_id) values ('1', '4');
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insert into u (id, kont_id) values ('2', '6');
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insert into u (id, kont_id) values ('3', '3');
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insert into u (id, kont_id) values ('4', '2');
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insert into u (id, kont_id) values ('5', '5');
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insert into u (id, kont_id) values ('6', '2');
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insert into u (id, kont_id) values ('7', '9');
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insert into u (id, kont_id) values ('8', '2');
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insert into u (id, kont_id) values ('9', '10');
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insert into u (id, kont_id) values ('10', '1');
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commit;
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alter table zf add constraint fk_zf__k
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foreign key(kont_id)
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references k(id)
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using index fk_zf__k
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;
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set statistics index fk_zf__k;
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create index ixa_fk__id__kont_id on zf(id, kont_id);
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commit;
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"""
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db = db_factory(init = init_sql)
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act = python_act('db', substitutions = [(r'record length: \d+, key length: \d+', 'record length: NN, key length: MM')])
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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('>=3')
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def test_1(act: Action, capsys):
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test_sql = """
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select zf.*
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from zf
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where zf.kont_id=5
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order by zf.id, kont_id
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"""
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with act.db.connect() as con:
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cur = con.cursor()
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ps = None
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try:
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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('')
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except DatabaseError as e:
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print(e.__str__())
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print(e.gds_codes)
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finally:
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if ps:
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ps.free()
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expected_stdout_5x = """
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Select Expression
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....-> Filter
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........-> Table "ZF" Access By ID
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............-> Index "IXA_FK__ID__KONT_ID" Full Scan
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................-> Bitmap
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....................-> Index "FK_ZF__K" Range Scan (full match)
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"""
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expected_stdout_6x = """
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Select Expression
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....-> Sort (record length: 36, key length: 16)
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........-> Filter
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............-> Table "ZF" Access By ID
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................-> Bitmap
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....................-> Index "FK_ZF__K" Range Scan (full match)
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"""
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act.expected_stdout = expected_stdout_5x if act.is_version('<6') else expected_stdout_6x
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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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