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Cluster cluster addslots(集群 槽位) cluster count failure reports(集群计数失败报告) cluster countkeysinslot cluster delslots cluster failover cluster forget cluster getkeysinslot cluster info cluster keyslot(集群键槽) cluster meet cluster nodes(集群节点) cluster replicate(集群复制) cluster reset(集群重置) cluster saveconfig cluster set config epoch cluster setslot cluster slaves cluster slots readonly readwrite Connection auth echo ping quit select swapdb Geo geoadd geodist geohash geopos georadius georadiusbymember Hashes hdel hexists hget hgetall hincrby hincrbyfloat hkeys hlen hmget hmset hscan hset hsetnx hstrlen hvals HyperLogLog pfadd pfcount pfmerge Keys del dump exists expire expireat keys migrate move object persist pexpire pexpireat pttl randomkey rename renamenx restore scan sort touch ttl type unlink wait Lists blpop brpop brpoplpush lindex linsert llen lpop lpush lpushx lrange lrem lset ltrim rpop rpoplpush rpush rpushx Pub/Sub psubscribe publish pubsub punsubscribe subscribe unsubscribe Scripting eval evalsha script debug script exists script flush script kill script load Server bgrewriteaof bgsave client getname client kill client list client pause client reply client setname command command count command getkeys command info config get config resetstat config rewrite config set dbsize debug object debug segfault flushall flushdb info lastsave monitor role save shutdown slaveof slowlog time Sets sadd scard sdiff sdiffstore sinter sinterstore sismember smembers smove spop srandmember srem sscan sunion sunionstore Sorted Sets zadd zcard zcount zincrby zinterstore zlexcount zrange zrangebylex zrangebyscore zrank zrem zremrangebylex zremrangebyrank zremrangebyscore zrevrange zrevrangebylex zrevrangebyscore zrevrank zscan zscore zunionstore Strings append bitcount bitfield bitop bitpos decr decrby get getbit getrange getset incr incrby incrbyfloat mget mset msetnx psetex set setbit setex setnx setrange strlen Transactions discard exec multi unwatch watch
Figuren

TTL key

自1.0.0起可用。

时间复杂度: O(1)

返回具有超时的密钥的剩余生存时间。这种内省功能允许Redis客户端检查给定密钥将继续成为数据集的一部分的秒数。

在 Redis 2.6 或更高版本中,-1如果密钥不存在或者密钥存在但没有关联到期,则该命令将返回。

从 Redis 2.8 开始,错误发生时的返回值发生了变化:

  • -2如果该键不存在,则该命令返回。

  • -1如果密钥存在但没有关联过期,则该命令返回。

另请参阅以毫秒分辨率返回相同信息的 PTTL 命令(仅在 Redis 2.6 或更高版本中可用)。

返回值

整数回复:TTL 以秒为单位,或者为负值以指示错误(请参阅上述说明)。

例子

redis>  SET mykey "Hello" "OK" 

redis>  EXPIRE mykey 10 (integer) 1 

redis>  TTL mykey (integer) 10

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