How To Map @ManyToOne Relationship To A SQL Query Via The Hibernate @JoinFormula
Description: This application is an example of mapping the JPA @ManyToOne relationship to a SQL query via the Hibernate @JoinFormula annotation. We start with two entities, Author and Book, involved in a unidirectional @ManyToOne relationship. Each book has a price. While we fetch a book by id (let's call it book A), we want to fetch another book B of the same author whose price is the next smaller price in comparison with book A price.
Key points:
- fetching the book
Bis done via@JoinFormula
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