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83 lines
2.3 KiB
Python
83 lines
2.3 KiB
Python
#coding:utf-8
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"""
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ID: issue-5751
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ISSUE: 5751
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TITLE: Available indices are not used in some cases if ORDER BY expression is a filtered one
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DESCRIPTION:
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JIRA: CORE-5481
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FBTEST: bugs.core_5481
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NOTES:
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[24.09.2023] pzotov
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Execution plan changed in FB 5.x since build 5.0.0.1211 (14-sep-2023).
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Expected output has been splitted on that remains actual for FB 4.x and one that issued for 5.x+.
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Confirmed by dimitr, letter 24.09.2023 13:30
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"""
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import pytest
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from firebird.qa import *
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db = db_factory()
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test_script = """
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recreate view v_test as select 1 x from rdb$database;
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commit;
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recreate table balances
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(
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balanceid bigint not null,
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orgaccountid bigint not null,
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balancedate date not null
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);
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recreate table org_accounts
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(
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orgaccountid bigint not null primary key
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);
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alter table balances add constraint pk_balances primary key (balanceid);
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alter table balances add constraint fk_balances_orgaccounts foreign key (orgaccountid) references org_accounts (orgaccountid);
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alter table balances add constraint balances_balancedate_orgaccount unique (orgaccountid, balancedate);
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create descending index balances_balancedate_desc on balances (balancedate);
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recreate view v_test as
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select b.*
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from balances b
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where
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orgaccountid=18 and
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balancedate<='01.01.2017'
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order by balancedate desc
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rows 1
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;
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commit;
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set plan on;
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select * from v_test;
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commit;
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ALTER TABLE BALANCES DROP CONSTRAINT BALANCES_BALANCEDATE_ORGACCOUNT;
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commit;
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select * from v_test; -- plan here should remains the same!
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commit;
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"""
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act = isql_act('db', test_script)
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expected_stdout_4x = """
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PLAN (V_TEST B ORDER BALANCES_BALANCEDATE_DESC INDEX (FK_BALANCES_ORGACCOUNTS))
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PLAN (V_TEST B ORDER BALANCES_BALANCEDATE_DESC INDEX (FK_BALANCES_ORGACCOUNTS))
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"""
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expected_stdout_5x = """
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PLAN SORT (V_TEST B INDEX (BALANCES_BALANCEDATE_ORGACCOUNT))
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PLAN (V_TEST B ORDER BALANCES_BALANCEDATE_DESC INDEX (FK_BALANCES_ORGACCOUNTS))
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"""
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@pytest.mark.version('>=3.0.4')
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def test_1(act: Action):
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act.expected_stdout = expected_stdout_4x if act.is_version('<5') else expected_stdout_5x
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act.execute()
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assert act.clean_stdout == act.clean_expected_stdout
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