FUNCTION FLUSH - Upstash Documentation

Use FUNCTION FLUSH to remove every function library from the database.

This wipes all registered libraries and functions at once and cannot be undone, so it belongs in test setup and provisioning tooling rather than application code. ASYNC reclaims the memory in the background and SYNC reclaims it before the reply is sent.

Syntax#

FUNCTION FLUSH [ASYNC | SYNC]

Arguments#

Argument	Required	Repeatable	Description
`(ASYNC \| SYNC)`	No	No	Choose one form: `ASYNC` (request asynchronous cleanup); `SYNC` (request synchronous cleanup).

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	Simple string `OK`
RESP3	Simple string `OK`

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

FUNCTION FLUSH

@upstash/redis

import { Redis } from "@upstash/redis";const redis = Redis.fromEnv();await redis.functions.flush()

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.function("FLUSH");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.functionFlush();console.log(result);

redis-py

import osimport redisclient = redis.from_url(os.environ["REDIS_URL"])result = client.function_flush()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.FunctionFlush(context.Background()).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.functionFlush();  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("FUNCTION");    command.arg("FLUSH");    let result: redis::Value = command.query(&mut connection)?;    println!("{result:?}");    Ok(())}