Master Hibernate and JPA with Spring Boot in 100 Steps - Step 16 - Implementing Insert and Update JPA Repository Methods

The video tutorial explains how to implement update and insert methods using the entity manager's merge function. It highlights that the same logic applies to both operations, as the entity manager determines whether to update or insert based on the presence of an ID. The tutorial demonstrates these operations in a JPA demo app, showing how queries are executed and how Hibernate assigns IDs using a sequence. It emphasizes the best practice of letting Hibernate handle ID assignment to ensure consistency and efficiency.

What is the primary function of the merge method in the Entity Manager?

• To only insert new records

• To delete a person from the database

• To handle both update and insert operations

• To only update existing records

What happens if an ID is not set when using the merge method?

• The existing record is updated

• A new record is inserted

• The operation fails

• The method throws an exception

In the JPA demo app, what is the significance of the queries being written?

• They indicate errors in the application

• They show the sequence of operations being executed

• They are used to debug the application

• They are irrelevant to the application's functionality

How does Hibernate assign IDs during the insert operation?

• It uses a random number generator

• It requires manual input for each ID

• It uses a sequence to assign IDs

• It assigns IDs based on a predefined list

What is the recommended approach for handling ID assignment during inserts?

• Use a third-party tool for ID assignment

• Assign IDs based on the current timestamp

• Manually assign IDs before insertion

• Let Hibernate handle ID assignment