Redis Things Command Example

command example: 1. The transaction is performed normally: #在Shell命令行下执行Redis的客户端工具. /> REDIS-CLI #在当前连接上启动一个新的事务. Redis 127.0.0.1:6379>multi Ok #执行事务中的第一条命令, as can be seen from the return result of this command, the command is not executed immediately, but is stored in the command queue of the transaction. Redis 127.0.0.1:6379>INCR T1 QUEUED #又执行一个新的命令, it can be seen from the result that the command is also stored in the command queue of the transaction. Redis 127.0.0.1:6379>INCR T2 QUEUED #执行事务命令队列中的所有命令, as you can see from the results, the results of the command in the queue are returned. Redis 127.0.0.1:6379>exec 1) (integer) 1 2) (integer) 1 2. There are failed commands in the transaction: #开启一个新的事务. Redis 127.0.0.1:6379>multi Ok #设置键a的值为string类型的3. Redis 127.0.0.1:6379>set a 3 QUEUED #从键a所关联的值的头部弹出元素, because the value is a string type, and the Lpop command can only be used with the list type, the command will fail when the EXEC command is executed. Redis 127.0.0.1:6379>lpop A QUEUED #再次设置键a的值为字符串4. Redis 127.0.0.1:6379>set a 4 QUEUED #获取键a的值 to confirm that the value was successfully set by the second set command in the transaction. Redis 127.0.0.1:6379>get A QUEUED #从结果中可以看出, the second command in a transaction fails Lpop execution, and the subsequent set and get commands are successful, which is the most important difference between a Redis transaction and a transaction in a relational database. Redis 127.0.0.1:6379>exec 1) OK 2) (Error) ERR operation against a key holding the wrong kind of value 3) OK 4) "4" 3. Rolling back a transaction: #为键t2设置一个事务执行前的值. Redis 127.0.0.1:6379>set T2 TT Ok #开启一个事务. Redis 127.0.0.1:6379>multi Ok #在事务内为该键设置一个新值. Redis 127.0.0.1:6379>set T2 ttnew QUEUED #放弃事务. Redis 127.0.0.1:6379>discard Ok #查看键t2的值, you can see from the result that the value of the key is still the value before the start of the transaction. Redis 127.0.0.1:6379>get T2 "TT" more exciting content please pay attention to: http://bbs.superwu.cn attention to the Superman Academy QR Code:

Example redis things command