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Use EXPIRETIME to read the absolute time at which a key will expire, as a Unix timestamp in seconds. The reply is -1 when the key exists but has no expiration, and -2 when the key does not exist, so the two cases can be told apart. Use TTL when you need the remaining lifetime instead of the deadline, and PEXPIRETIME when you need millisecond precision.

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.
This command is not supported yet in @upstash/redis.
This command is not supported yet in upstash_redis.