🧠 Introduction

When building modern apps, you often need to perform complex database operations — like filtering data, calculating values, or combining multiple queries. Writing all this logic directly in your Flutter app can quickly become messy and inefficient.

That’s where RPC (Remote Procedure Call) functions in Supabase come in.

👉 RPC functions allow you to write SQL functions inside your database and call them directly from your app as if they were APIs.

✅ Why use RPC functions in Supabase?

Keep business logic inside the database (cleaner architecture)

Reduce network calls (better performance)

Improve security (controlled access to data)

Reuse logic across multiple clients (Flutter, Web, etc.)

🧰 Prerequisites

Before we start, make sure you have:

✅ A Flutter project set up

✅ A Supabase project created

✅ Supabase Flutter SDK installed

✅ Basic knowledge of SQL (SELECT, WHERE, etc.)

⚙️ Step 1: Create an RPC Function in Supabase

Let’s say we have a tasks table and we want to fetch all…