QueryFence

Open-source Java library that analyzes real SQL queries during integration tests to detect missing tenant_id conditions in multi-tenant SaaS applications. Fails builds on queries that could leak data between tenants, with precise error location (class, method, line). Supports Spring Data JPA, JPQL, native queries, MyBatis, jOOQ, and JdbcTemplate. Works with JOINs, subqueries, CTEs, UNION branches, and OR conditions. No test code changes required—just add a test dependency and policy file. Includes REPORT mode for safe trial runs.