Often times, Redis is used as a cache and it becomes necessary to delete keys based on certain patterns or prefixes. For example, you might want to invalidate all cache entries that have a specific prefix when an update occurs.
The 'redis' module in Node.js doesn't directly support deleting keys by prefix. But you can achieve this by combining the 'KEYS' command and the 'DEL' command.
In this code, we first obtain all keys with the provided prefix using the 'keys' function and then delete them using the 'del' function.
Q: Can I use wildcard characters in the key prefix? A: Yes, you can use wildcard characters like '*' in the prefix to match multiple keys.
Q: What happens when no keys match the prefix?
del command will not delete any keys, and it will return 0.