Can we pass or input a .sql file to the Query annotation in Spring JPA?
Something like this @Query(file:/sql/employeeList.sql , nativeQuery=true)
/sql/employeeList.sql - i would like to put this file somewhere in the code, which will have the select sql in it.
I am not looking to have native sql string @Query("select abc....", nativeQuery=true) -- I dont want to use like this. because my sql is too huge.
@Jens Schauder is right you can't specify a sql file in Spring Data Jpa but as an alternative solution you could use this library https://github.com/VEINHORN/spring-data-sqlfile or you could simply load the file on your own.
Note: im using lombok on this example
@Component
@Slf4j
@AllArgsConstructor
public class ArticleBatchRepository {
@PersistenceContext
EntityManager em;
public List<ArticleBatch> findAll(String articleId) {
Query nativeQuery = em.createNativeQuery(loadQuery("/db/queries/articles/BatchByWarehouse.sql"), ArticleBatch.class);
nativeQuery.setParameter(1, articleId);
return (List<ArticleBatch>) nativeQuery.getResultList();
}
private String loadQuery(String path) {
try {
InputStream is = this.getClass().getResourceAsStream(path);
java.util.Scanner s = new java.util.Scanner(is).useDelimiter("\\A");
return s.hasNext() ? s.next() : "";
} catch (Exception e) {
log.error("Failed to load query {}: {}", path, e.getMessage(), e);
return null;
}
}
}
You can't specify a sql file but Spring Data JPA will look in /META-INF/jpa-named-queries.properties
to find named queries, which allows you to specify queries in a sql file.
This is described in this answer to a similar question.
You can check this repository.
You need to provide a JpaQueryMethodFactory bean to your configuration. You can extend the JpaQueryMethod class and override the getAnnotatedQuery and getRequiredAnnotatedQuery functions to read queries from the file.
@Queryannotation but you can check this repo. You can just create your own JpaQueryMethodFactory that provides your own version ofJpaQueryMethod.