mirror of
https://github.com/MariaDB/server.git
synced 2025-11-03 20:36:16 +01:00
d20a96f9c1
In MariaDB, we have a confusing problem where: * The transaction_isolation option can be set in a configuration file, but it cannot be set dynamically. * The tx_isolation system variable can be set dynamically, but it cannot be set in a configuration file. Therefore, we have two different names for the same thing in different contexts. This is needlessly confusing, and it complicates the documentation. The same thing applys for transaction_read_only. MySQL 5.7 solved this problem by making them into system variables. https://dev.mysql.com/doc/relnotes/mysql/5.7/en/news-5-7-20.html This commit takes a similar approach by adding new system variables and marking the original ones as deprecated. This commit also resolves some legacy problems related to SET STATEMENT and transaction_isolation.
403 lines
7 KiB
Text
403 lines
7 KiB
Text
** Setup **
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SET @session_transaction_isolation = @@SESSION.transaction_isolation;
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SET @global_transaction_isolation = @@GLOBAL.transaction_isolation;
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connect con0,localhost,root,,;
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connection con0;
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SET SESSION AUTOCOMMIT = OFF;
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connect con1, localhost, root,,;
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connection con1;
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SET SESSION AUTOCOMMIT = OFF;
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connection default;
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CREATE TABLE t1 (a int PRIMARY KEY, b int) ENGINE=INNODB;
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INSERT INTO t1 VALUES(2, 2);
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INSERT INTO t1 VALUES(4, 4);
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INSERT INTO t1 VALUES(6, 6);
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INSERT INTO t1 VALUES(8, 8);
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INSERT INTO t1 VALUES(16, 16);
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INSERT INTO t1 VALUES(18, 18);
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INSERT INTO t1 VALUES(20, 20);
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INSERT INTO t1 VALUES(22, 22);
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INSERT INTO t1 VALUES(24, 24);
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'#----------------------------FN_DYNVARS_184_01--------------------------------------#'
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connection con0;
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SET SESSION transaction_isolation = 'READ-UNCOMMITTED';
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set binlog_format=mixed;
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connection con1;
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SET SESSION transaction_isolation = 'READ-UNCOMMITTED';
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set binlog_format=mixed;
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connection con0;
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START TRANSACTION;
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SELECT * FROM t1 WHERE a IN (2,4,6,8) FOR UPDATE;
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a b
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2 2
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4 4
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6 6
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8 8
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UPDATE t1 SET b = 10 WHERE a IN (2,4,6,8);
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connection con1;
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START TRANSACTION;
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SELECT * FROM t1;
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a b
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2 10
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4 10
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6 10
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8 10
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16 16
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18 18
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20 20
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22 22
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24 24
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INSERT INTO t1 VALUES(1, 1);
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INSERT INTO t1 VALUES(3, 3);
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SELECT * FROM t1;
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a b
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1 1
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2 10
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3 3
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4 10
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6 10
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8 10
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16 16
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18 18
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20 20
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22 22
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24 24
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COMMIT;
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connection con0;
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DELETE FROM t1 WHERE a = 1 OR a = 3;
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COMMIT;
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'#----------------------------FN_DYNVARS_184_02--------------------------------------#'
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connection con0;
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START TRANSACTION;
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SELECT * FROM t1 WHERE a % 2 = 0 FOR UPDATE;
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a b
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2 10
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4 10
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6 10
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8 10
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16 16
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18 18
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20 20
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22 22
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24 24
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UPDATE t1 SET b = 10 WHERE a % 2 = 0;
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connection con1;
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START TRANSACTION;
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SELECT * FROM t1;
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a b
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2 10
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4 10
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6 10
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8 10
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16 10
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18 10
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20 10
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22 10
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24 10
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INSERT INTO t1 VALUES(23, 23);
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INSERT INTO t1 VALUES(25, 25);
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SELECT * FROM t1;
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a b
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2 10
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4 10
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6 10
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8 10
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16 10
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18 10
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20 10
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22 10
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23 23
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24 10
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25 25
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COMMIT;
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connection con0;
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COMMIT;
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'#----------------------------FN_DYNVARS_184_03--------------------------------------#'
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connection con0;
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SET SESSION transaction_isolation = 'READ-COMMITTED';
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connection con1;
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SET SESSION transaction_isolation = 'READ-COMMITTED';
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connection con0;
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START TRANSACTION;
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SELECT * FROM t1 WHERE a % 2 = 0 FOR UPDATE;
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a b
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2 10
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4 10
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6 10
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8 10
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16 10
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18 10
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20 10
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22 10
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24 10
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UPDATE t1 SET b = 11 WHERE a % 2 = 0;
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connection con1;
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START TRANSACTION;
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SELECT * FROM t1;
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a b
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2 10
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4 10
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6 10
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8 10
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16 10
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18 10
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20 10
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22 10
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23 23
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24 10
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25 25
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INSERT INTO t1 VALUES(5, 5);
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INSERT INTO t1 VALUES(7, 7);
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SELECT * FROM t1;
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a b
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2 10
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4 10
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5 5
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6 10
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7 7
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8 10
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16 10
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18 10
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20 10
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22 10
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23 23
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24 10
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25 25
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COMMIT;
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connection con0;
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COMMIT;
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'#----------------------------FN_DYNVARS_184_04--------------------------------------#'
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connection con0;
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SET SESSION transaction_isolation = 'REPEATABLE-READ';
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connection con1;
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SET SESSION transaction_isolation = 'REPEATABLE-READ';
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connection con0;
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START TRANSACTION;
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SELECT * FROM t1 WHERE a % 2 = 0 FOR UPDATE;
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a b
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2 11
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4 11
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6 11
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8 11
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16 11
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18 11
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20 11
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22 11
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24 11
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UPDATE t1 SET b = 12 WHERE a % 2 = 0;
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connection con1;
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START TRANSACTION;
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SELECT * FROM t1;
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a b
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2 11
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4 11
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5 5
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6 11
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7 7
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8 11
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16 11
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18 11
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20 11
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22 11
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23 23
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24 11
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25 25
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INSERT INTO t1 VALUES(9, 9);
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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INSERT INTO t1 VALUES(13, 13);
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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Expected error "Lock wait timeout"
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SELECT * FROM t1;
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a b
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2 11
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4 11
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5 5
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6 11
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7 7
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8 11
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16 11
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18 11
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20 11
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22 11
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23 23
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24 11
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25 25
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COMMIT;
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connection con0;
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COMMIT;
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'#----------------------------FN_DYNVARS_184_05--------------------------------------#'
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connection con0;
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START TRANSACTION;
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SELECT * FROM t1 WHERE a IN (2,4,6,8,10,12,14,16,18,20,22,24,26) = 0 FOR UPDATE;
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a b
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5 5
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7 7
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23 23
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25 25
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UPDATE t1 SET b = 13 WHERE a IN (2,4,6,8,10,12,14,16,18,20,22,24,26) = 0;
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connection con1;
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START TRANSACTION;
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SELECT * FROM t1;
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a b
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2 12
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4 12
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5 5
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6 12
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7 7
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8 12
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16 12
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18 12
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20 12
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22 12
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23 23
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24 12
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25 25
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INSERT INTO t1 VALUES(9, 9);
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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INSERT INTO t1 VALUES(13, 13);
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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Expected error "Lock wait timeout"
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SELECT * FROM t1;
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a b
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2 12
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4 12
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5 5
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6 12
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7 7
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8 12
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16 12
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18 12
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20 12
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22 12
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23 23
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24 12
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25 25
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COMMIT;
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connection con0;
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COMMIT;
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'#----------------------------FN_DYNVARS_184_06--------------------------------------#'
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connection con0;
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START TRANSACTION;
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SELECT * FROM t1 WHERE a IN (2,4,6,8) = 0 FOR UPDATE;
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a b
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5 13
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7 13
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16 12
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18 12
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20 12
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22 12
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23 13
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24 12
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25 13
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UPDATE t1 SET b = 14 WHERE a IN (2,4,6,8) = 0;
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connection con1;
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START TRANSACTION;
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SELECT * FROM t1;
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a b
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2 12
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4 12
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5 13
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6 12
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7 13
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8 12
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16 12
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18 12
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20 12
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22 12
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23 13
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24 12
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25 13
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INSERT INTO t1 VALUES(9, 9);
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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INSERT INTO t1 VALUES(13, 13);
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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Expected error "Lock wait timeout"
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SELECT * FROM t1;
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a b
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2 12
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4 12
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5 13
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6 12
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7 13
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8 12
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16 12
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18 12
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20 12
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22 12
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23 13
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24 12
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25 13
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COMMIT;
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connection con0;
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COMMIT;
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'#----------------------------FN_DYNVARS_184_07--------------------------------------#'
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connection con0;
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SET SESSION transaction_isolation = 'SERIALIZABLE';
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connection con1;
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SET SESSION transaction_isolation = 'SERIALIZABLE';
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connection con0;
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START TRANSACTION;
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SELECT * FROM t1 WHERE a % 2 = 0 FOR UPDATE;
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a b
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2 12
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4 12
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6 12
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8 12
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16 14
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18 14
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20 14
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22 14
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24 14
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UPDATE t1 SET b = 15 WHERE a % 2 = 0;
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connection con1;
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START TRANSACTION;
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SELECT * FROM t1;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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INSERT INTO t1 VALUES(15, 15);
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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INSERT INTO t1 VALUES(17, 17);
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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SELECT * FROM t1;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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COMMIT;
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connection con0;
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COMMIT;
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'#----------------------------FN_DYNVARS_184_08--------------------------------------#'
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SET GLOBAL transaction_isolation = 'READ-UNCOMMITTED';
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connect con_int1,localhost,root,,;
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connection con_int1;
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SELECT @@SESSION.transaction_isolation;
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@@SESSION.transaction_isolation
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READ-UNCOMMITTED
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READ-UNCOMMITTED Expected
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SET SESSION transaction_isolation = 'SERIALIZABLE';
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connect con_int2,localhost,root,,;
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connection con_int2;
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SELECT @@SESSION.transaction_isolation;
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@@SESSION.transaction_isolation
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READ-UNCOMMITTED
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READ-UNCOMMITTED Expected
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SET SESSION transaction_isolation = 'REPEATABLE-READ';
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connection con_int2;
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SELECT @@SESSION.transaction_isolation;
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@@SESSION.transaction_isolation
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REPEATABLE-READ
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REPEATABLE-READ Expected
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connection con_int1;
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SELECT @@SESSION.transaction_isolation;
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@@SESSION.transaction_isolation
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SERIALIZABLE
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SERIALIZABLE Expected
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SELECT @@GLOBAL.transaction_isolation;
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@@GLOBAL.transaction_isolation
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READ-UNCOMMITTED
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READ-UNCOMMITTED Expected
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connection default;
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disconnect con_int1;
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disconnect con_int2;
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SET @@SESSION.transaction_isolation = @session_transaction_isolation;
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SET @@GLOBAL.transaction_isolation = @global_transaction_isolation;
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connection default;
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disconnect con0;
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disconnect con1;
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DROP TABLE t1;
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