Difference Between CAST and TREAT in JPA
Yatin B.Date: 2024-10-30
JPA offers CAST and TREAT for handling polymorphic queries in inheritance hierarchies. CAST, primarily used with native SQL queries, performs type conversions; TREAT, within JPQL or Criteria API, allows treating entities as subclasses. CAST is database-specific and handles type conversions like string to integer, while TREAT enables querying subclasses within an inheritance hierarchy. Misusing either can lead to exceptions like ClassCastException or IllegalArgumentException. Choosing the correct function depends on whether you're dealing with database-specific type conversions or querying subclasses within a JPA context.
Read more: https://www.javacodegeeks.com/jpa-cast-vs-treat.html
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