PostgreSQL Schemas for Multi-Tenant SaaS

1. Deep Architecture

Shared-schema multi-tenancy isolates data using row-level filters. Schema-based multi-tenancy puts each client’s tables in a separate PostgreSQL schema namespace. Dynamic updates to the connection’s search_path route queries to the active tenant’s tables.

2. The Feynman Gatekeeper

[KNOWLEDGE CHECK] Compare schema-based isolation and row-level database filtering. How do they affect query isolation and database scale limits?

3. The Code

from django.db import connection

def set_tenant_schema(tenant_id):
    with connection.cursor() as cursor:
        # Update PostgreSQL search path to route to tenant schema
        cursor.execute(f"SET search_path TO tenant_{tenant_id}, public")

4. The Funnel

Stat Level-Up: Tenant Guard (Lvl 1).
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