HGETALL key
Available since: 2.0.0
Time complexity: O(N) where N is the size of the hash.
ACL categories:
@read
@hash
@slow
Returns all fields and values of the hash stored at key.
In the returned value, every field name is followed by its value, so the length
of the reply is twice the size of the hash.
Return
Array reply: list of fields and their values stored in the hash, or an
empty list when key does not exist.