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https://github.com/MariaDB/server.git
synced 2025-04-26 11:49:09 +03:00
91 lines
3.2 KiB
Plaintext
91 lines
3.2 KiB
Plaintext
SET @save_timeout=@@GLOBAL.innodb_lock_wait_timeout;
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SET GLOBAL innodb_lock_wait_timeout=100000000;
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DESCRIBE INFORMATION_SCHEMA.INNODB_TRX;
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Field Type Null Key Default Extra
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trx_id bigint(21) unsigned NO NULL
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trx_state varchar(13) NO NULL
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trx_started datetime NO NULL
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trx_requested_lock_id varchar(81) YES NULL
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trx_wait_started datetime YES NULL
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trx_weight bigint(21) unsigned NO NULL
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trx_mysql_thread_id bigint(21) unsigned NO NULL
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trx_query varchar(1024) YES NULL
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trx_operation_state varchar(64) YES NULL
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trx_tables_in_use bigint(21) unsigned NO NULL
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trx_tables_locked bigint(21) unsigned NO NULL
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trx_lock_structs bigint(21) unsigned NO NULL
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trx_lock_memory_bytes bigint(21) unsigned NO NULL
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trx_rows_locked bigint(21) unsigned NO NULL
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trx_rows_modified bigint(21) unsigned NO NULL
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trx_concurrency_tickets bigint(21) unsigned NO NULL
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trx_isolation_level enum('READ UNCOMMITTED','READ COMMITTED','REPEATABLE READ','SERIALIZABLE') NO NULL
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trx_unique_checks int(1) NO NULL
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trx_foreign_key_checks int(1) NO NULL
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trx_last_foreign_key_error varchar(256) YES NULL
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trx_is_read_only int(1) NO NULL
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trx_autocommit_non_locking int(1) NO NULL
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CREATE TABLE t1 (
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c01 INT,
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c02 INT,
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PRIMARY KEY (c01)
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) ENGINE=INNODB STATS_AUTO_RECALC=0;
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INSERT INTO t1 VALUES
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(1,2),(2,4),(3,6),(4,8);
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CREATE TABLE t2 (
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c01 INT,
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c02 INT,
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PRIMARY KEY (c01),
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FOREIGN KEY fk1 (c02) REFERENCES t1 (c01)
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) ENGINE=INNODB STATS_AUTO_RECALC=0;
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INSERT INTO t2 VALUES
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(1,1),(2,2),(3,3);
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connect con_trx,localhost,root,,;
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connect con_verify_innodb_trx,localhost,root,,;
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connection con_trx;
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SET autocommit=0;
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INSERT INTO t1 VALUES (5,10);
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SELECT * FROM t1 FOR UPDATE;
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c01 c02
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1 2
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2 4
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3 6
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4 8
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5 10
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connection con_verify_innodb_trx;
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SELECT trx_state, trx_weight, trx_tables_in_use, trx_tables_locked,
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trx_rows_locked, trx_rows_modified, trx_concurrency_tickets,
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trx_isolation_level, trx_unique_checks, trx_foreign_key_checks
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FROM INFORMATION_SCHEMA.INNODB_TRX;
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trx_state trx_weight trx_tables_in_use trx_tables_locked trx_rows_locked trx_rows_modified trx_concurrency_tickets trx_isolation_level trx_unique_checks trx_foreign_key_checks
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RUNNING 3 0 1 6 1 0 REPEATABLE READ 1 1
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connection con_trx;
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ROLLBACK;
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SET FOREIGN_KEY_CHECKS = 0;
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SET UNIQUE_CHECKS = 0;
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SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
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BEGIN;
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INSERT INTO t1 VALUES (6,12);
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connection con_verify_innodb_trx;
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SELECT trx_isolation_level, trx_unique_checks, trx_foreign_key_checks
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FROM INFORMATION_SCHEMA.INNODB_TRX;
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trx_isolation_level trx_unique_checks trx_foreign_key_checks
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SERIALIZABLE 0 0
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connection con_trx;
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ROLLBACK;
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SET FOREIGN_KEY_CHECKS = 1;
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SET UNIQUE_CHECKS = 1;
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BEGIN;
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INSERT INTO t2 VALUES (4,10);
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ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `fk1` FOREIGN KEY (`c02`) REFERENCES `t1` (`c01`))
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disconnect con_trx;
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connection con_verify_innodb_trx;
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SELECT trx_state, trx_isolation_level, trx_last_foreign_key_error
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FROM INFORMATION_SCHEMA.INNODB_TRX;
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trx_state trx_isolation_level trx_last_foreign_key_error
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RUNNING REPEATABLE READ `test`.`t2`, CONSTRAINT `fk1` FOREIGN KEY (`c02`) REFERENCES `t1` (`c01`)
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disconnect con_verify_innodb_trx;
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connection default;
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DROP TABLE t2;
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DROP TABLE t1;
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SET GLOBAL innodb_lock_wait_timeout=@save_timeout;
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