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同时对三张表进行插入操作，事务保证完整性。下面进行简单测试：
1. 锁定表
锁定用户表
LOCK TABLES user WRITE;
查看表是否锁定：
show OPEN TABLES where In_use > 0;
显示被锁定的表。
2. 验证在同一session下是否可以插入操作
insert into user(userId,ip,type,terminal) values(10002,‘127.0.0.1‘,7,‘pc‘);
可以操作成功。
3. 启动spring应用，执行插入操作，不能成功。
4，解锁
UNLOCK TABLES;
查看被锁定的表：
show OPEN TABLES where In_use > 0;
上述表不在锁定中。
5. 调用spring应用，执行插入操作，操作可以成功。
所以，应用spring的@transactional进行事务管理是ok的。
附录：
SHOW OPEN TABLES [{FROM | IN} db_name]
[LIKE ‘pattern‘ | WHERE expr]
SHOW OPEN TABLES lists the non-TEMPORARY tables that are currently open in the table cache. SeeSection 8.4.3.1, “How MySQL Opens and Closes Tables”. The WHERE clause can be given to select rows using more general conditions, as discussed in Section 19.18, “Extensions to SHOW Statements”.
The FROM and LIKE clauses may be used as of MySQL 5.0.12. The LIKE clause, if present, indicates which table names to match. The FROM clause, if present, restricts the tables shown to those present in the db_namedatabase.
SHOW OPEN TABLES output has the following columns:
Database
The database containing the table.
Table
The table name.
In_use
The number of table locks or lock requests there are for the table. For example, if one client acquires a lock for a table using LOCK TABLE t1 WRITE, In_use will be 1. If another client issues LOCK TABLE t1 WRITE while the table remains locked, the client will block waiting for the lock, but the lock request causes In_use to be 2. If the count is zero, the table is open but not currently being used. In_use is also increased by the HANDLER ... OPENstatement and decreased by HANDLER ... CLOSE.
Name_locked
Whether the table name is locked. Name locking is used for operations such as dropping or renaming tables.
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原文地址：http://www.cnblogs.com/davidwang456/p/4882674.html
