Skip to main content
Use PTTL to read how much longer a key will live, in milliseconds. The reply is -1 when the key exists but has no expiration and -2 when the key does not exist, so a missing key and a permanent one are easy to tell apart. It is the millisecond form of TTL, and the extra precision matters for short-lived keys such as locks, where rounding to whole seconds hides most of the remaining lifetime.

Syntax

Arguments

Important points

  • Negative integer replies are sentinel values, not durations or timestamps; see the response description for missing or persistent data.

Response

The reply reports the result of the operation. Error replies have the same shape in RESP2 and RESP3 and are surfaced as exceptions by the SDKs below.
Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.

Examples

TCP examples use the TLS REDIS_URL from the Upstash console. REST examples use UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN.

Related topics

PTTLTTLOverview