This week's book giveaways are in the Cloud and AI/ML forums. We're giving away four copies each of Cloud Native Patterns and Natural Language Processing and have the authors on-line! See this thread and this one for details.
A Gift entity is in a one-to-many relationship with a Product entity. An EJB developer writes a query to delete gifts
that have an item of "JPA" or "JSF" and writes the following Java Persistence query language statement.
DELETE FROM Gift g WHERE g.name IN ("JPA", "JSF")/
If the query with a PersistenceException, what can be the cause?
B. The query causes a foreign key integrity constraint to be violated.
C. The database does not have any users with the name "JPA" or "JSF".
Correct answer :B
Should C be the answer as well?
The specification 4.10 does not say whether the persistence provider will throw an exception if a record does not exist when DELETE is executed.
Note that: if the OneToMany relationship is an unidirectional relationship between Gift and Product there will be a JoinTable inbetween. Running the given delete query in that setup won't cause an exception to be thrown.