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Oso Cloud's local authorization feature enables efficient authorization decisions in microservices by combining facts stored in Oso with a service's local database. The `listLocal()` method generates SQL WHERE clauses for bulk queries, while `authorizeLocal()` produces SQL SELECT statements for single-entity operations. This approach eliminates the need to replicate all authorization data to Oso and avoids inefficient one-by-one authorization checks. Configuration files map Polar predicates to SQL queries, allowing services to leverage local facts alongside centralized authorization policies for better performance and reduced coupling.

Authentication and authorization in a microservice architecture: Part 6 - implementing complex authorization using Oso Cloud local authorization

Problem: Implementing findSecuritySystems() §

Making authorization decisions with locally stored facts §

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