presto-redis/src/main/java/io/prestosql/plugin/redis/RedisConnectorConfig.java/RedisConnectorConfig/setRedisDataBaseIndex
class RedisConnectorConfig:    @Config("redis.database-index")
    public RedisConnectorConfig setRedisDataBaseIndex(int redisDataBaseIndex)
    {
        this.redisDataBaseIndex = redisDataBaseIndex;
        return this;
    }