The Pub/Sub system can remove the relevant messages from the subscription. Acknowledging a message whose ack deadline has expired may succeed, but such a message may be redelivered later. Acknowledging a message more than once will not result in an error.
subscriptions_ack(ack_ids, subscription)logical TRUE if message(s) was successfully acknowledged
character A vector containing one or more message ackIDs
character, Subscription Required, the subscription whose messages
are being acknowledged
Other Subscription functions:
subscriptions_create(),
subscriptions_delete(),
subscriptions_detach(),
subscriptions_exists(),
subscriptions_get(),
subscriptions_list(),
subscriptions_modify_ack_deadline(),
subscriptions_modify_pushconf(),
subscriptions_patch(),
subscriptions_pull(),
subscriptions_seek()