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FIELDTTL

Syntax​

FIELDTTL key field

Time complexity: O(1)

ACL categories: @keyspace, @read, @fast

Warning: Experimental! Dragonfly-specific.

Returns the remaining time to live of a field that has a timeout (either hash or set). This introspection capability allows a Dragonfly client to check how many seconds a given field will continue to be part of the dataset. A WRONGTYPE error is returned if the key is not a hash or set.

Return​

Integer reply: TTL in seconds, or a negative value in order to signal an error.

  • The command returns -1 if the field exists but has no associated TTL.
  • The command returns -2 if the key does not exist.
  • The command returns -3 if the field does not exist.

Examples​

dragonfly> HSETEX myhash 10 field1 "Hello"
(integer) 1
# wait for 6 seconds
dragonfly> FIELDTTL myhash field1
(integer) 4