If one session has a shared or exclusive lock on record R in an index, another session cannot insert

【If one session has a shared or exclusive lock on record R in an index, another session cannot insert】的更多相关文章

If one session has a shared or exclusive lock on record R in an index, another session cannot insert

If one session has a shared or exclusive lock on record R in an index, another session cannot insert a new index record in the gap immediately before R in the index order. 如果一个session 有一个共享或者排它锁在记录R上,另外的session 不能插入新的index record 在before R这个区间 Sessio…

Shared and Exclusive Locks 共享和排它锁

14.5 InnoDB Locking and Transaction Model InnoDB 锁和事务模型 14.5.1 InnoDB Locking 14.5.2 InnoDB Transaction Model 14.5.3 Locks Set by Different SQL Statements in InnoDB 14.5.4 Phantom Rows 14.5.5 Deadlocks in InnoDB 实现一个大规模的,繁忙的,或者可扩展的数据库应用,从不同数据库系统的大量代码…

MySQL Shared and Exclusive Locks

官方文档 InnoDB implements standard row-level locking where there are two types of locks, shared (S) locks and exclusive (X) locks. A shared (S) lock permits the transaction that holds the lock to read a row. An exclusive (X) lock permits the transaction…

启动weblogic的错误：Could not obtain an exclusive lock to the embedded LDAP data files directory

http://hi.baidu.com/kaisep/item/0e4bf6ee5da001d1ea34c986 源地址启动weblogic的错误:Could not obtain an exclusive lock to the embedded LDAP data files directory 启动weblogic时报以下错误:<2004-12-22 上午05时25分29秒 CST> <Critical> <WebLogicServer> <BEA-000…

java：Session（概述，三层架构实例（实现接口封装JDBC），Session实现简单购物车实例）

1.Session概述: Session:在计算机中,尤其是在网络应用中,称为“会话控制”.Session 对象存储特定用户会话所需的属性及配置信息.这样,当用户在应用程序的 Web 页之间跳转时,存储在 Session 对象中的变量将不会丢失,而是在整个用户会话中一直存在下去.当用户请求来自应用程序的 Web 页时,如果该用户还没有会话,则 Web 服务器将自动创建一个 Session 对象.当会话过期或被放弃后,服务器将终止该会话.Session 对象最常见的一个用法就是存储用户的首选项.例…