订阅
Syntax
SUBSCRIBE channel [channel ...]
- Available since:
- 2.0.0
- Time complexity:
- O(N) where N is the number of channels to subscribe to.
- ACL categories:
-
@pubsub,@slow,
订阅客户端到指定的频道。
一旦客户端进入订阅状态，除了额外的SUBSCRIBE、SSUBSCRIBE、PSUBSCRIBE、UNSUBSCRIBE、SUNSUBSCRIBE、PUNSUBSCRIBE、PING、RESET和QUIT命令外，不应该发出任何其他命令。然而，如果使用RESP3（参见HELLO），客户端在订阅状态下可以发出任何命令。
欲了解更多信息，请参阅Pub/sub。
行为变更历史
>= 6.2.0:RESET可以被调用来退出订阅状态。
RESP2/RESP3 回复
When successful, this command doesn't return anything. Instead, for each channel, one message with the first element being the stringsubscribe is pushed as a confirmation that the command succeeded.