Redis can be used either directly as a keystore, where the value is a string. Or in a more complex way, it could be a data structure, such as a hash or a list. Assuming we have a second case and under the key "H", there is a hash. Elements can be added to the hash and deleted. In the end, the hash can be empty and can be re-filled again.
I found out that if we remove the last element from the data structure, our hash is “H”, Redis removes it from the current keys for some reason.
Example:
HSET "H" "key1" "value1"
HSET "H" "key2" "value2"
HDEL "H" "key1"
<-- Here, "H" is in the list of current keys, whereby HLEN returns 1
HDEL "H" "key2"
<-- Here, for some reason, "H" is not shown among existing keys,
not even as an empty hash (HLEN 0)
HSET "H" "key3" "value3"
<-- Hash is back in the list of keys
My question is: is it possible to configure Redis so that it still shows the value (empty hash in our example) of this key ("H" in our example) as an empty nontrivial data structure