#DSL

Postgres's lateral joins allow for quite the good eDSL

PostgreSQL's lateral joins enable composable, type-safe query builders that overcome fundamental limitations in traditional ORMs and query builders, allowing reusable query functions and complex joins to be expressed clearly in application code while generating optimized SQL automatically. This approach addresses critical pain points in data access layers—such as composition difficulties, type safety gaps, and M2M relationship complexity—positioning lateral joins as a strategic alternative to conventional ORM abstractions. CIOs should evaluate lateral join-based query libraries (like Rel8 in Haskell) to improve data access layer maintainability, reduce technical debt from ORM brittleness, and strengthen type safety in database-intensive applications.