mirror of
https://github.com/MariaDB/server.git
synced 2025-01-30 18:41:56 +01:00
82 lines
1.9 KiB
Text
82 lines
1.9 KiB
Text
connect con1, localhost, root;
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CREATE TABLE t(a INT PRIMARY KEY) ENGINE=InnoDB;
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INSERT INTO t VALUES(1);
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BEGIN;
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INSERT INTO t VALUES(2);
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UPDATE t SET a=20 WHERE a=2;
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connect con2, localhost, root;
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# Normal MariaDB shutdown would roll back the above transaction.
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# We want the transaction to remain open, so we will kill the server
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# after ensuring that any non-transactional files are clean.
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FLUSH TABLES;
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# Create another transaction that will be recovered as COMMITTED.
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BEGIN;
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SET DEBUG_SYNC='after_trx_committed_in_memory SIGNAL committed WAIT_FOR ever';
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COMMIT;
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connection default;
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SET DEBUG_SYNC='now WAIT_FOR committed';
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# Ensure that the above transactions become durable.
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SET GLOBAL innodb_flush_log_at_trx_commit=1;
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BEGIN;
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INSERT INTO t VALUES(-10000);
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DELETE FROM t WHERE a=-10000;
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COMMIT;
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# restart: --innodb-force-recovery=3
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disconnect con1;
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disconnect con2;
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SELECT * FROM t;
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a
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1
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SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
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SELECT * FROM t;
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a
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1
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20
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UPDATE t SET a=3 WHERE a=1;
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# restart: --innodb-read-only
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SET GLOBAL innodb_status_output= @@GLOBAL.innodb_status_output;
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# Starting with MariaDB 10.2, innodb_read_only implies READ UNCOMMITTED.
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# In earlier versions, this would return the last committed version
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# (only a=3; no record for a=20)!
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SELECT * FROM t;
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a
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3
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20
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SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
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SELECT * FROM t;
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a
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3
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20
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# restart: --innodb-force-recovery=5
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#
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# MDEV-15418 innodb_force_recovery=5 displays bogus warnings
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# about too new transaction identifier
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#
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# With the fix, innodb_force_recovery=5 implies READ UNCOMMITTED.
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SELECT * FROM t;
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a
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3
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20
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SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
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SELECT * FROM t;
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a
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3
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20
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SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
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SELECT * FROM t;
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a
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3
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20
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#
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# MDEV-27332 SIGSEGV in fetch_data_into_cache
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#
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BEGIN;
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SELECT trx_state FROM information_schema.innodb_trx;
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trx_state
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COMMIT;
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# restart
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SELECT * FROM t;
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a
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3
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DROP TABLE t;
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FOUND 1 /Rolled back recovered transaction [^0]/ in mysqld.1.err
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