multi tenant architectureintermediateReddit r/ExperiencedDevs thread with 400+ upvotesMAX
Row-Level Security Policy Drift in Shared-Schema Postgres : Isolation Guarantees Enforced by Structure, Not Convention
PostgreSQLPL/pgSQLPythonpgTAP
Problem Breakdown
The systemic defect is that tenant isolation depends on developer discipline : prefixes, middleware calls, policy conventions : when it must depend on structure that makes violations impossible to express. Multi-tenant SaaS on shared-schema Postgres relies on RLS policies with a session GUC (app.current_tenant); every…
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