Golang : Switch Redis database redis.NewClient

Problem : Your default Redis connection is using database 0 and you want to get some keys from different Redis database during runtime.

Solution : Create another Redis client with the database index.

 // Create a new Redis client with different db
 redisClient := redis.NewClient(&redis.Options{
  Addr: os.Get("REDIS_HOST") + ":" + os.Get("REDIS_PORT"),
  Password: os.Get("REDIS_PASSWORD"),
  DB: 9, // use different database than 0
 })

 defer redisClient.Close()
 // do what you want here

 // for example
 iter := redisClient.Scan(ctx, 0, "hscodes:*", 0).Iterator() // scan to get all the keys matching wildcard pattern.

Reference :

https://github.com/go-redis/redis