Onboarding a new table into row-level security should be four lines of metadata. Not two new objects, a code review, and a platform-team ticket. This post describes a tag-driven attribute-based access control (ABAC) pattern built on Databricks Unity Catalog primitives that achieves the objective of one UDF per filter shape, one policy per shape, and a single control table that drives all per-group authorization logic.I work as a solutions architect with large enterprises running hundreds of tables across multiple regions, product lines, and source systems, where row-level security follows a pattern: Group A sees records from System X. Group B sees the regions China and India. Group C sees plant key 333. Group D combines two source systems. Group E sees everything except specific values. The domain (finance, healthcare, etc.) doesn't matter. The pattern remains the same.