presto-redis/src/main/java/io/prestosql/plugin/redis/RedisRecordCursor.java/RedisRecordCursor/RedisRecordCursor
class RedisRecordCursor:    RedisRecordCursor(
            RowDecoder keyDecoder,
            RowDecoder valueDecoder,
            RedisSplit split,
            List<RedisColumnHandle> columnHandles,
            RedisJedisManager redisJedisManager)
    {
        this.keyDecoder = keyDecoder;
        this.valueDecoder = valueDecoder;
        this.split = split;
        this.columnHandles = columnHandles;
        this.redisJedisManager = redisJedisManager;
        this.jedisPool = redisJedisManager.getJedisPool(split.getNodes().get(0));
        this.scanParms = setScanParms();
        this.currentRowValues = new FieldValueProvider[columnHandles.size()];

        fetchKeys();
    }