How To Fetch DTO Via Constructor Expression and JPQL
Description: Fetching more data than needed is prone to performance penalities. Using DTO allows us to extract only the needed data. In this application we rely on Constructor Expression and JPQL.
Key points:
- write a proper constructor in the DTO class
- use a query as
SELECT new com.bookstore.dto.AuthorDto(a.name, a.age) FROM Author a - for using Spring Data Projections check this item
See also:
How To Fetch DTO Via Constructor And Spring Data Query Builder Mechanism
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