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Added/Updated tests\bugs\gh_4954_test.py: Checked on 6.0.0.438, 5.0.2.1479, 4.0.6.3142, 3.0.12.33784.
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tests/bugs/gh_4954_test.py
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tests/bugs/gh_4954_test.py
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#coding:utf-8
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"""
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ID: issue-4954
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ISSUE: https://github.com/FirebirdSQL/firebird/issues/4954
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TITLE: subselect losing the index when where clause includes coalesce() [CORE4640]
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DESCRIPTION:
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NOTES:
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[21.08.2024] pzotov
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Confirmed bug on 2.1.7.18553. No such problem on 2.5.927156.
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Checked on 6.0.0.438, 5.0.2.1479, 4.0.6.3142, 3.0.12.33784.
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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 t1 (
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id int not null,
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vc1 varchar(1) not null,
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i1 int not null,
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i2 int not null,
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constraint t1_pk primary key (id) using descending index t1_pk,
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constraint t1_uk1 unique (i1, i2, vc1)
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);
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recreate table t2 (
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id int not null,
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vc1 varchar(1) not null,
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i1 int not null,
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i2 int not null,
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constraint t2_pk primary key (id) using descending index t2_pk,
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constraint t2_uk1 unique (i1, i2, vc1)
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);
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recreate table t3 (
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id int not null,
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i1_1 int,
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i1_2 int
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);
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create view v1 (ID, VC1, I1, I2) as
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select t1.id, t1.vc1, t1.i1, t1.i2
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from t1
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union all
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select t2.id, t2.vc1, t2.i1, t2.i2
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from t2;
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commit;
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insert into t1 (id, vc1, i1, i2) values (9, 'a', 1009, 1000);
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insert into t1 (id, vc1, i1, i2) values (8, 'a', 1008, 1000);
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insert into t1 (id, vc1, i1, i2) values (7, 'a', 1007, 1000);
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insert into t1 (id, vc1, i1, i2) values (6, 'a', 1006, 1000);
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insert into t1 (id, vc1, i1, i2) values (5, 'a', 1005, 1000);
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insert into t1 (id, vc1, i1, i2) values (4, 'a', 1004, 1000);
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insert into t1 (id, vc1, i1, i2) values (3, 'a', 1003, 1000);
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insert into t1 (id, vc1, i1, i2) values (2, 'a', 1002, 1000);
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insert into t1 (id, vc1, i1, i2) values (1, 'a', 1001, 1000);
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insert into t2 (id, vc1, i1, i2) values (19, 'a', 1019, 1000);
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insert into t2 (id, vc1, i1, i2) values (18, 'a', 1018, 1000);
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insert into t2 (id, vc1, i1, i2) values (17, 'a', 1017, 1000);
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insert into t2 (id, vc1, i1, i2) values (16, 'a', 1016, 1000);
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insert into t2 (id, vc1, i1, i2) values (15, 'a', 1015, 1000);
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insert into t2 (id, vc1, i1, i2) values (14, 'a', 1014, 1000);
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insert into t2 (id, vc1, i1, i2) values (13, 'a', 1013, 1000);
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insert into t2 (id, vc1, i1, i2) values (12, 'a', 1012, 1000);
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insert into t2 (id, vc1, i1, i2) values (11, 'a', 1011, 1000);
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insert into t2 (id, vc1, i1, i2) values (10, 'a', 1010, 1000);
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insert into t3 (id, i1_1, i1_2) values (100000, null, 1010);
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insert into t3 (id, i1_1, i1_2) values (100001, 1012, null);
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commit;
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set statistics index t1_pk;
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set statistics index t2_pk;
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set statistics index t1_uk1;
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set statistics index t2_uk1;
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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')
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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')
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def test_1(act: Action, capsys):
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test_sql = """
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select t3.id,
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(select first 1 v1.id
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from v1
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where
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v1.vc1 = 'A'
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and v1.i2 = 1000
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and v1.i1 = coalesce(t3.i1_1, t3.i1_2)
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)
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from t3
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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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expected_plan_4x = """
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Select Expression
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....-> Singularity Check
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........-> First N Records
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............-> Filter
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................-> Union
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....................-> Filter
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........................-> Table "T1" as "V1 T1" Access By ID
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............................-> Bitmap
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................................-> Index "T1_UK1" Unique Scan
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....................-> Filter
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........................-> Table "T2" as "V1 T2" Access By ID
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............................-> Bitmap
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................................-> Index "T2_UK1" Unique Scan
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Select Expression
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....-> Table "T3" Full Scan
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"""
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expected_plan_5x = """
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Sub-query
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....-> Singularity Check
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........-> First N Records
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............-> Filter
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................-> Filter
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....................-> Union
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........................-> Filter
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............................-> Table "T1" as "V1 T1" Access By ID
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................................-> Bitmap
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....................................-> Index "T1_UK1" Unique Scan
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........................-> Filter
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............................-> Table "T2" as "V1 T2" Access By ID
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................................-> Bitmap
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....................................-> Index "T2_UK1" Unique Scan
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Select Expression
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....-> Table "T3" Full Scan
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"""
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act.expected_stdout = expected_plan_4x if act.is_version('<5') else expected_plan_5x
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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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