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81 lines
2.8 KiB
Python
81 lines
2.8 KiB
Python
#coding:utf-8
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"""
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ID: session.alter-session-reset-rollback
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ISSUE: 6093
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TITLE: ALTER SESSION RESET: ROLLBACK current user transaction (if present) and issue
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warning if that transaction changes any table before reset
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DESCRIPTION:
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Test issue about ALTER SESSION RESET:
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"ROLLBACK current user transaction (if present) and issue warning if that transaction changes any table before reset ".
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We create trivial table and insert one row in it.
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Then, without committing changes, we issue 'ALTER SESSION RESET'.
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Warning must be thrown after it (in STDERR) and no records must remain in the table as result.
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NOTE. *** SET AUTODDL OFF REQUIRED ***
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Following is detailed explanation of this note:
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Default ISQL behaviour is to start always *TWO* transactions (for DML and second for DDL)
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after previous commit / rollback and before *ANY* further satement is to be executed, except
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those which control ISQL itself (e.g. 'SET TERM'; 'IN ...'; 'SET BAIL' etc).
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So, even when statement <S> has nothing to change, ISQL will start TWO transactions
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just before executing <S>.
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This means that these transactions will start even if want to run 'ALTER SESSION RESET'.
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This, in turn, makes one of them (which must perform DDL) be 'active and NOT current'
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from ALTER SESSION point of view (which is run within DML transaction).
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According to description given in #6093, ALTER SESSION throws error isc_ses_reset_err
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"if any open transaction exist in current conneciton, *except of current transaction* and
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prepared 2PC transactions which is allowed and ignored by this check".
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So, we have to prohibit 'autostart' of DDL-transaction because otherwise ALTER SESSION will
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throw: "SQLSTATE = 01002 / Cannot reset user session / -There are open transactions (2 active)".
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This is done by 'SET AUTODDL OFF' statement at the beginning of this test script.
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Thanks to Vlad for explanations (discussed 18.01.2021).
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FBTEST: functional.session.alter_session_reset_rollback
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JIRA: CORE-5832
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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 table test(id int);
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commit;
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set list on;
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set autoddl off;
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commit;
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insert into test(id) values(1);
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--------------------
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alter session reset;
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--------------------
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set count on;
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select * from test;
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"""
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act = isql_act('db', test_script)
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expected_stdout = """
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Records affected: 0
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"""
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expected_stderr = """
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Session was reset with warning(s)
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-Transaction is rolled back due to session reset, all changes are lost
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"""
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@pytest.mark.version('>=4.0')
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def test_1(act: Action):
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act.expected_stdout = expected_stdout
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act.expected_stderr = expected_stderr
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act.execute()
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assert (act.clean_stderr == act.clean_expected_stderr and
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act.clean_stdout == act.clean_expected_stdout)
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