jpql

Lets say we have this JPA-annotated class, with a property of type List. This code is currently working fine. @Entity public class Family { ... @CollectionOfElements(targetElement=java.lang.String.class) @JoinTable(name = "elements_family", joinColumns = @JoinColumn(name = "idFamily") ) @Column(name = "element", nullable = false) private List<String> elements; ... } Is there any way to query for the list of Families that contain the element "yyy" ? That is, something like: Query query = getEntityManager().createQuery("select f FROM Family f WHERE element = :element"); query.setParameter(

This question already has an answer here: Limit number of results in JPQL 2 answers How can I limit in a select query of JPQL named query? I need the limit to be done in the query level itself and not in the java layer!!! I am trying to use @NamedQueries(value = { @NamedQuery(name = UserNotification.QueryName.NOTIFICATION_DISPLAYED, query = "SELECT un FROM UserNotification un " + "WHERE un.orgId IN (:orgList) " + "AND un.user.id = :userId LIMIT 5") but in vain!!! Please suggest Kevin Bowersox JPQL does not provide a mechanism to limit queries. This is most often achieved by using the

I was wondering if it's possible to create such query like : em.createQuery( "SELECT NEW EmpMenu(p.name, p.department.name) " + "FROM Project p ").getResultList(); also is it possible to do it via Specification: public Predicate toPredicate(Root<T> root, CriteriaQuery<?> query, CriteriaBuilder cb) { return ???; } Thanks in advance! Yes, Criteria API does have have construct similar to JPQL constructor expressions. Result class is set via construct method in CriteriaBuilder. Your JPQL query expressed as an criteria query is: CriteriaBuilder cb... CriteriaQuery<EmpMenu> q = cb.createQuery

My understanding of SQL and JPQL are not that great and I have been trying to create a JPQL query of the following sql statement: select group.* from user, user_group, group where user_group.user_id = user.id and user_group.group_id = group.id and user.id = [userID to search] edit: Woops I forgot to add the search by user id part to the query. I would like to get all groups that a user belongs in. But I just cannot get the syntax correct. Any help would be greatly appreciated. Relevant code snippets: Group.java @Table(name = "group") @Entity public class Group implements Serializable { @Id

I'm not able to use Spring Data JPA projections and specifications together. I have the following setup: Entity: @Entity public class Country { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; @Column(name = "NAME", nullable = false) private String name; @Column(name = "CODE", nullable = false) private String code; ---getters & setters--- } Projection Interface: public interface CountryProjection { String getName(); } Country Specification: public class CountrySpecification { public static Specification<Country> predicateName(final String name) { return new Specification

I have below entities: public class Category { private Integer id; @OneToMany(mappedBy = "parent") private List<Topic> topics; } public class Topic { private Integer id; @OneToMany(mappedBy = "parent") private List<Posts> posts; @ManyToOne @JoinColumn(name = "id") private Category parent; } public class Post { private Integer id; @ManyToOne @JoinColumn(name = "id") private Topic parent; /* Post fields */ } and I want fetch all categories with joined topics and joined posts using JPQL query. I was wrote query like below: SELECT c FROM Category c JOIN FETCH c.topics t JOIN FETCH t.posts p WHERE

I'm working with PostgreSQL query implementing in JPQL. This is a sample native psql query which works fine, SELECT * FROM students ORDER BY id DESC LIMIT 1; The same query in JPQL doesnt work, @Query("SELECT s FROM Students s ORDER BY s.id DESC LIMIT 1") Students getLastStudentDetails(); seems like LIMIT clause doesn't work in JPQL. According to JPA documentation we can use setMaxResults/setFirstResult , Can anyone tell me how can I use that in my above query? You are using JPQL which doesn't support limiting results like this. When using native JPQL you should use setMaxResults to limit the

This may be a simple question, but I'm trying to find out if there is a way that I can create a JPQL update query that would allow me to update a single Persisted Entity using a unique column identifier that is not the primary key. Say I have and entity like the following: @Entity public class Customer { @ID private Long id; @Column private String uniqueExternalID; @Column private String firstname; .... } Updating this entity with a Customer that has the id value set is easy, however, id like to update this customer entity using the uniqueExternalId without having to pre-query for the local