This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe the result of EntityManager.persist inside and outside of a transaction.
Continue readingAuthor: Michael Bouschen
JPA Pitfalls (13): EntityManager.merge Result
This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe a common error when using EntityManager.merge.
Continue readingJPA Pitfalls (12): Lazy Loading of Relationships in a Loop
This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe a potential performance problem when loading relationships in a loop.
Continue readingJPA Pitfalls (11): Iteration / Sorting in Memory or in DB
This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe a potential problem when filtering in memory instead of DB.
Continue readingJPA Pitfalls (10): Query Flush Mode
This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe unexpected results of JPQL queries with respect of the query flush mode.
Continue readingJPA Pitfalls (9): UPDATE/DELETE and Persistence Context
This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe bulk the effect of JPQL operations on the EntityManager cache.
Continue readingJPA Pitfalls (8): Navigation of Relationships
This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe unexpected results of navigational JPQL queries.
Continue readingJPA Pitfalls (7): Null Parameter
This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe issues with using null parameter values.
Continue readingJPA Pitfalls (6): Query Result with Duplicates
This blog article is part of a “series of blog articles” about common pitfalls using JPA and ways to avoid them. In this article, we describe unexpected duplicates in the result of a JPQL query.
Continue reading