What is the difference between FetchType.LAZY and FetchType.EAGER in Hibernate?
When dealing with associations in Hibernate, FetchType defines how and when related entities are loaded from the database. The main difference between FetchType.LAZY and FetchType.EAGER lies in the loading strategy:
FetchType.LAZY
With FetchType.LAZY, related entities are not loaded from the database until they are explicitly accessed in your code. This can help improve performance and reduce unnecessary database queries, especially when dealing with large datasets or associations that are not always needed.
FetchType.EAGER
With FetchType.EAGER, related entities are loaded from the database immediately along with the parent entity. While this can simplify data access in some cases, it may lead to performance issues and increased database load if the eagerly fetched associations are not always required.
It's important to choose the appropriate FetchType based on your application's requirements and performance considerations. Consider using FetchType.LAZY for better optimization and FetchType.EAGER for scenarios where immediate access to related entities is essential.
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