ARDEL - Upstash Documentation

Use ARDEL to empty one or more array slots.

Deleting a slot leaves a hole rather than shifting later values down, so every other index keeps its meaning. The reply counts the slots that actually held a value, so indexes that were already empty do not inflate it. Removing the last remaining value deletes the key.

Deletion does not move the append cursor: ARNEXT still reports the slot after the highest index ever appended, so an ARINSERT will not silently reuse a freed index.

See the array command overview for the data model these commands share.

Syntax#

ARDEL <key> <index> [<index> ...]

Arguments#

Argument	Required	Repeatable	Description
`<key>`	Yes	No	Array key targeted by the command.
`<index>`	Yes	Yes	Zero-based index to clear. Repeat to clear several slots in one call.

Response#

The reply reports the result of the operation. Error replies have the same shape in RESP2 and RESP3 and are surfaced as exceptions by the SDKs below.

Protocol	Reply
RESP2	Integer
RESP3	Integer

Note

Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.

Examples#

TCP examples use the TLS REDIS_URL from the Upstash console. REST examples use UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN.

Redis CLI

ARDEL my-array 0 1

@upstash/redis

Note

This command is not supported yet in @upstash/redis.

upstash_redis

Note

This command is not supported yet in upstash_redis.

ioredis

import Redis from "ioredis";const redis = new Redis(process.env.REDIS_URL!);const result = await redis.ardel("my-array", 0, 1);console.log(result);

node-redis

import { createClient } from "redis";const client = await createClient({ url: process.env.REDIS_URL })  .on("error", console.error)  .connect();const result = await client.arDel("my-array", [0, 1]);console.log(result);

redis-py

import osimport redisclient = redis.from_url(os.environ["REDIS_URL"])result = client.ardel("my-array", 0, 1)print(result)

go-redis

package mainimport (    "context"    "fmt"    "os"    "github.com/redis/go-redis/v9")func main() {    opts, err := redis.ParseURL(os.Getenv("REDIS_URL"))    if err != nil {        panic(err)    }    client := redis.NewClient(opts)    result, err := client.ARDel(context.Background(), "my-array", 0, 1).Result()    if err != nil {        panic(err)    }    fmt.Println(result)}

jedis

import java.net.URI;import redis.clients.jedis.Jedis;try (Jedis jedis = new Jedis(new URI(System.getenv("REDIS_URL")))) {  Object result = jedis.ardel("my-array", 0, 1);  System.out.println(result);}

redis-rs

fn main() -> redis::RedisResult<()> {    let url = std::env::var("REDIS_URL").expect("REDIS_URL is not set");    let client = redis::Client::open(url)?;    let mut connection = client.get_connection()?;    let mut command = redis::cmd("ARDEL");    command.arg("my-array");    command.arg("0");    command.arg("1");    let result: redis::Value = command.query(&mut connection)?;    println!("{result:?}");    Ok(())}