mirror of
https://github.com/FirebirdSQL/firebird-qa.git
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139 lines
4.6 KiB
Python
139 lines
4.6 KiB
Python
#coding:utf-8
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"""
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ID: issue-5515
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ISSUE: https://github.com/FirebirdSQL/firebird/issues/5515
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TITLE: IN/ANY/ALL predicates may cause sub-optimal (late filtering) execution of joins
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DESCRIPTION:
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Plan BEFORE fix was (confirmed on 4.0.0.258):
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...
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Select Expression
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-> Filter
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-> Nested Loop Join (inner) <<<<<<< no filter of "DP_REGISTRO" table
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-> Table "DP_REGISTRO" Full Scan <<<<<<< after it was scanned
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-> Filter
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...
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Plan AFTER fix (confirmed on 4.0.0.313):
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...
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Select Expression
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-> Nested Loop Join (inner)
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-> Filter <<<<<<<<<<<<<<<<<<<<<<<<<<< EARLY FILTERING MUST BE HERE <<<<<
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-> Table "DP_REGISTRO" Full Scan
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-> Filter
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...
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JIRA: CORE-5236
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FBTEST: bugs.core_5236
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NOTES:
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[16.06.2024] pzotov
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Plan for FB 5.x and 6.x changed since 28-may-2024, build 6.0.0.363 #95442.
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It was adjusted after talk with dimitr: must be the same for all FB versions
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(with only difference: 'Sub-query' at the top line for FB 5.x+).
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Changed filler character for show padding ('#' --> '.').
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"""
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import pytest
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from firebird.qa import *
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init_script = """
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recreate table dp_registro_oest(
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autoinc_registro int primary key using index pk_dp_registro_oest,
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registro_pri_roest integer not null,
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registro_sec_roest integer not null
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);
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recreate table dp_recibo(
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codigo_rec bigint primary key,
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registro_rec integer not null,
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competencia_rec varchar(6) not null,
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unique(registro_rec, competencia_rec) using index unq1_dp_recibo
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);
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recreate table dp_registro(
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autoinc_registro integer primary key using index pk_dp_registro
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);
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alter table dp_registro_oest
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add constraint fk_dp_registro_oest_1 foreign key (registro_pri_roest)
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references dp_registro (autoinc_registro) on update cascade
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,add constraint fk_dp_registro_oest_2 foreign key (registro_sec_roest)
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references dp_registro (autoinc_registro) on update cascade
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,add constraint unq1_dp_registro_oest unique (registro_pri_roest, registro_sec_roest)
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;
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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('>=3.0.1')
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def test_1(act: Action, capsys):
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test_sql = """
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select 1
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from dp_recibo
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inner join dp_registro on dp_registro.autoinc_registro = dp_recibo.registro_rec
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where
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dp_registro.autoinc_registro in (
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select registro_sec_roest
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from dp_registro_oest
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where registro_pri_roest = 1
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)
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;
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"""
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fb4x_expected_out = """
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Select Expression
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....-> Filter
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........-> Filter
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............-> Table "DP_REGISTRO_OEST" Access By ID
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................-> Bitmap
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....................-> Index "UNQ1_DP_REGISTRO_OEST" Unique Scan
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Select Expression
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....-> Nested Loop Join (inner)
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........-> Filter
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............-> Table "DP_REGISTRO" Full Scan
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........-> Filter
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............-> Table "DP_RECIBO" Access By ID
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................-> Bitmap
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....................-> Index "UNQ1_DP_RECIBO" Range Scan (partial match: 1/2)
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"""
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fb5x_expected_out = """
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Sub-query
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....-> Filter
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........-> Filter
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............-> Table "DP_REGISTRO_OEST" Access By ID
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................-> Bitmap
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....................-> Index "UNQ1_DP_REGISTRO_OEST" Unique Scan
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Select Expression
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....-> Nested Loop Join (inner)
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........-> Filter
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............-> Table "DP_REGISTRO" Full Scan
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........-> Filter
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............-> Table "DP_RECIBO" Access By ID
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................-> Bitmap
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....................-> Index "UNQ1_DP_RECIBO" Range Scan (partial match: 1/2)
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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 = cur.prepare(test_sql)
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print( '\n'.join([replace_leading(s) for s in ps.detailed_plan.split('\n')]) )
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act.expected_stdout = fb4x_expected_out if act.is_version('<5') else fb5x_expected_out
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act.execute(combine_output = True)
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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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