Hypersistence Optimizer allows you to get the most out of JPA and Hibernate. By scanning your application configuration and mappings, Hypersistence Optimizer can tell you what changes you need to do to speed up your data access layer.
When calling merge, if the entity uses an auto-generated identifier, the entity risks of changing its hashCode, hence it won't be located in a Set collection in which the entity was stored prior to being merged.
vladmihalcea
commented
2 years ago
When calling merge, if the entity uses an auto-generated identifier, the entity risks of changing its hashCode, hence it won't be located in a
Setcollection in which the entity was stored prior to being merged.