mirror of
https://github.com/MariaDB/server.git
synced 2025-11-04 12:56:14 +01:00
99 lines
2.2 KiB
Text
99 lines
2.2 KiB
Text
CREATE TABLE bug_53756 (pk INT, c1 INT) ENGINE=InnoDB;
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ALTER TABLE bug_53756 ADD PRIMARY KEY (pk);
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INSERT INTO bug_53756 VALUES(1, 11), (2, 22), (3, 33), (4, 44);
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# Select a less restrictive isolation level.
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SET GLOBAL TRANSACTION ISOLATION LEVEL READ COMMITTED;
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SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
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COMMIT;
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# Start a transaction in the default connection for isolation.
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START TRANSACTION;
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SELECT @@tx_isolation;
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@@tx_isolation
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READ-COMMITTED
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SELECT * FROM bug_53756;
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pk c1
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1 11
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2 22
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3 33
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4 44
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connect con1,localhost,root,,;
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START TRANSACTION;
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SELECT @@tx_isolation;
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@@tx_isolation
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READ-COMMITTED
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DELETE FROM bug_53756 WHERE pk=1;
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connect con2,localhost,root,,;
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START TRANSACTION;
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SELECT @@tx_isolation;
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@@tx_isolation
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READ-COMMITTED
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DELETE FROM bug_53756 WHERE pk=2;
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connect con3,localhost,root,,;
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START TRANSACTION;
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SELECT @@tx_isolation;
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@@tx_isolation
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READ-COMMITTED
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UPDATE bug_53756 SET c1=77 WHERE pk=3;
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connect con4,localhost,root,,;
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START TRANSACTION;
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SELECT @@tx_isolation;
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@@tx_isolation
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READ-COMMITTED
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UPDATE bug_53756 SET c1=88 WHERE pk=4;
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connect con5,localhost,root,,;
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START TRANSACTION;
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SELECT @@tx_isolation;
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@@tx_isolation
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READ-COMMITTED
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INSERT INTO bug_53756 VALUES(5, 55);
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connect con6,localhost,root,,;
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START TRANSACTION;
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SELECT @@tx_isolation;
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@@tx_isolation
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READ-COMMITTED
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INSERT INTO bug_53756 VALUES(6, 66);
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connection con1;
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COMMIT;
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connection con3;
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COMMIT;
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connection con4;
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ROLLBACK;
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connection con6;
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ROLLBACK;
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# The connections 2 and 5 stay open.
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# Delete of row 1 was committed.
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# Update of row 3 was committed.
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# Due to isolation level read committed, these should be included.
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# All other changes should not be included.
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connection default;
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SELECT * FROM bug_53756;
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pk c1
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2 22
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3 77
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4 44
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START TRANSACTION;
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INSERT INTO bug_53756 VALUES (666,666);
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# restart
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disconnect con1;
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disconnect con2;
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disconnect con3;
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disconnect con4;
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disconnect con5;
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disconnect con6;
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#
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# Select recovered data.
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# Delete of row 1 was committed.
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# Update of row 3 was committed.
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# These should be included.
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# All other changes should not be included.
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# Delete of row 2 and insert of row 5 should be rolled back
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SELECT * FROM bug_53756;
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pk c1
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2 22
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3 77
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4 44
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DROP TABLE bug_53756;
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