https://blog.adriencaubel.fr/series/spring-jpa/Recent content in Spring JPA on Adrien CAUBELHugoenSat, 08 Aug 2026 00:00:00 +0000https://blog.adriencaubel.fr/posts/spring/spring_jpa_combime_projection_and_specification/Sat, 08 Aug 2026 00:00:00 +0000https://blog.adriencaubel.fr/posts/spring/spring_jpa_combime_projection_and_specification/Tip GitHub project : https://github.com/Adrien-Courses/Spring-jpa-specification-projection For a long time, combining a Specification (dynamic filtering) with a Projection (selecting only the columns you need) was considered impossible in Spring Data JPA. The usual answer on StackOverflow was: Starting from Spring Data 3.0, mixing projections and specifications is supported. [… BUT …] the generated SQL still queries all the columns This is no longer true. In this article we review projections, specifications, and how to combine them while keeping a narrow SQL query.