Returns the expiration time in milliseconds of a key.
PTTL key
Like TTL this command returns the
remaining time to live of a key that has an expire set, with the sole
difference that TTL returns the amount of remaining time in
seconds while PTTL returns it in milliseconds.
The command returns the following values in case of errors:
-2 if the key does not exist.-1 if the key exists but has no
associated expire.One of the following:
Integer reply: TTL in milliseconds.
Integer reply:
-1 if the key exists but has no associated
expiration.
Integer reply:
-2 if the key does not exist.
O(1)
@fast @keyspace @read
127.0.0.1:6379> SET mykey "Hello"
OK
127.0.0.1:6379> EXPIRE mykey 1
(integer) 1
127.0.0.1:6379> PTTL mykey
(integer) 989COPY, DEL, DUMP, EXISTS, EXPIRE, EXPIREAT, EXPIRETIME, KEYS, MIGRATE, MOVE, OBJECT, OBJECT ENCODING, OBJECT FREQ, OBJECT HELP, OBJECT IDLETIME, OBJECT REFCOUNT, PERSIST, PEXPIRE, PEXPIREAT, PEXPIRETIME, RANDOMKEY, RENAME, RENAMENX, RESTORE, SCAN, SORT, SORT_RO, TOUCH, TTL, TYPE, UNLINK, WAIT, WAITAOF.