HKEYS command in Redis is used to retrieve all the keys present in a hash. Its common use cases are when there is a need to examine or iterate over the keys in a hash, especially:
In Golang, we can use the
go-redis package to interact with Redis. Here's how you can use the
HKeys function to get all keys from a hash:
This example establishes a connection to Redis (adjust the
Addr as needed), sets a hash with two fields (
field2) to demonstrate, and then uses
HKeys to retrieve all the keys in the hash.
HKeysfunction. Failing to do so might lead to unexpected behavior or crashes.
HKEYSon large hashes as it may block the server for a long time if the hash contains many keys.
HKeysfunction. It's important to always check for errors in Go to make sure the operation was successful.
HKEYSon a key that is not a hash will return an error. Always validate that the key points to a hash before attempting to use
Q: Does HKEYS return fields in any particular order? A: No, the order of fields returned by HKEYS is not guaranteed.
Q: What happens if there are no fields in the hash? A: If the hash is empty or the key does not exist, HKEYS will return an empty list.