About Anuj Kumar
Introduction
Recently I have been working with FETCH JOINS in JPA 2 to fetch the data eagerly from the Database and I learned quite a lot on why we should avoid using Fetch Joins in our day to day operations.
Today’s blog post talks about my experience with Fetch and my learning (based mostly on the review comments I got when I had lots of FETCH JOINS in my query).
Problem Statement
There was a situation in our project where an Entity was being fetched from the Database that had many Collection Valued Associations defined ( OneToMany, ManyToMany , also referred as ToMany association). Here is a conceptual picture of how the entity looked like(getters and setters are omitted for clarity purpose) . This is an extremely simplified example of the Entity. In the real scenario we had around 11 associations.
Source : http://www.javacodegeeks.com/2013/07/jpa-2-fetch-joins-and-whether-we-should-use-them.html
