redis EXEC command
Translation results：
exec
UK[ɪgˈzek] 美[ɪɡ'zek]
abbr.execute execution;executive execution
plural: execs
redis EXEC commandsyntax
Function: Execute all commands in the transaction block.
Syntax: EXEC
Description: If a certain (or some) key is under the monitoring of the WATCH command, and the transaction block If there are commands related to this (or these) key, then the EXEC command will only be executed and take effect when this (or these) key has not been modified by other commands, otherwise the transaction will be aborted.
Available versions: >= 1.2.0
Time complexity: The sum of the time complexity of all commands within the transaction block.
Return: The return value of all commands within the transaction block, arranged in the order of command execution.
When the operation is interrupted, the empty value nil is returned.
redis EXEC commandexample
# 事务被成功执行 redis> MULTI OK redis> INCR user_id QUEUED redis> INCR user_id QUEUED redis> INCR user_id QUEUED redis> PING QUEUED redis> EXEC 1) (integer) 1 2) (integer) 2 3) (integer) 3 4) PONG # 监视 key ，且事务成功执行 redis> WATCH lock lock_times OK redis> MULTI OK redis> SET lock "huangz" QUEUED redis> INCR lock_times QUEUED redis> EXEC 1) OK 2) (integer) 1 # 监视 key ，且事务被打断 redis> WATCH lock lock_times OK redis> MULTI OK redis> SET lock "joe" # 就在这时，另一个客户端修改了 lock_times 的值 QUEUED redis> INCR lock_times QUEUED redis> EXEC # 因为 lock_times 被修改， joe 的事务执行失败 (nil)