PTTL

PTTL key

Available since:

2.6.0

Time complexity:

O(1)

ACL categories:

@keyspace, @read, @fast,

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.

In Redis 2.6 or older the command returns -1 if the key does not exist or if the key exist but has no associated expire.

Starting with Redis 2.8 the return value in case of error changed:

• The command returns -2 if the key does not exist.
• The command returns -1 if the key exists but has no associated expire.

Examples

RESP2/RESP3 Reply

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.

History

• Starting with Redis version 2.8.0: Added the -2 reply.