EXEC to execute in Redis

Introduction

EXEC runs all the commands queued in a transaction together. It helps make sure multiple commands happen at the same time.

When you want to update several pieces of data at once without interruption.

When you need to execute all commands atomically.

When you want to avoid other changes happening between your commands.

When you want to group commands to improve performance by sending them together.

Syntax

Redis

MULTI
...commands...
EXEC

MULTI starts the transaction and queues commands.

EXEC runs all queued commands atomically.

Examples

Sets two keys together in one transaction.

Redis

MULTI
SET key1 value1
SET key2 value2
EXEC

Increments a counter twice atomically.

Redis

MULTI
INCR counter
INCR counter
EXEC

Sample Program

This transaction sets the name and age for user 1 together.

Redis

MULTI
SET user:1:name "Alice"
SET user:1:age 30
EXEC

Important Notes

If any command in the transaction fails, EXEC still runs all commands.

Use DISCARD to cancel the transaction before EXEC.

EXEC returns an array with the results of each command.

Summary

EXEC runs all queued commands in a transaction at once.

Use MULTI to start queuing commands before EXEC.

EXEC helps keep data changes safe and consistent.