PostgreSQL Error 42501: Insufficient Privilege

PostgreSQL error 42501 (Insufficient Privilege) explained: what it means, why it happens, and how to fix it — with copy-paste code examples.

SQLSTATE 42501 PostgreSQL Last verified 2026-08-19

Quick Answer

Read the error for the exact object and required privilege. If that does not apply, gRANT the needed privilege from a role that owns the object — the full checklist is below.

Error Code

SQLSTATE: 42501
Official name: Insufficient Privilege
Service: PostgreSQL

What does this error mean?

The current user lacks the privilege required to perform the operation.

Common Causes

How to Fix

  1. Read the error for the exact object and required privilege
  2. GRANT the needed privilege from a role that owns the object
  3. For RLS, add a USING/WITH CHECK policy that allows the role
  4. Confirm you connected as the intended role (SELECT current_user)

Code Examples

Grant table privileges sql 
GRANT SELECT, INSERT, UPDATE ON orders TO app_rw;

Grant only the privileges the role needs (least privilege); the owner retains all rights automatically.

Framework-Specific Fixes

supabase

For client calls, add an RLS policy; for server/admin work, use the service role key.

CREATE POLICY "users read own"
ON profiles FOR SELECT TO authenticated
USING (auth.uid() = id);
django

Use a DB role with the right grants per environment; never use the superuser in app code.

# settings: use least-privilege role per env
DATABASES = {'default': {'USER': 'app_rw'}}

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Frequently Asked Questions

Why am I seeing PostgreSQL error 42501?

Most often this happens when connecting as a role without SELECT/INSERT/UPDATE on the target table, or when trying to create objects in a schema without CREATE privilege.

How do I fix PostgreSQL error 42501?

Read the error for the exact object and required privilege.

Which frameworks have documented fixes for error 42501?

This page documents fixes for: supabase, django.

Official Sources

This page is based on the official PostgreSQL documentation linked below and adds practical troubleshooting guidance on top.