What is batch fetching in ORM?

What is batch fetching in ORM?

Batch fetching in ORM (Object-Relational Mapping) is a technique used to optimize database queries by loading multiple records in a single query instead of fetching them one by one.

Why is batch fetching important?

It's important because it reduces the number of database calls, which can significantly improve performance, especially when dealing with large datasets.

Can you give me an example of how to implement batch fetching?

Sure! In frameworks like Hibernate, you can use the @BatchSize annotation to specify how many records to fetch in one go. For example, @BatchSize(size=10) will fetch 10 records at a time.

Are there any downsides to using batch fetching?

Yes, if the batch size is too large, it can lead to increased memory usage and potentially slow down the application. It's important to find a balance.