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Custom Query for fetching data from multiple tables in spring Data Jpa

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Entities are following Product Table @Entity public class Product implements Serializable { /*@Id @GeneratedValue(strategy = GenerationType.AUTO) private Integer id;*/ @Id @GeneratedValue(strategy = GenerationType.AUTO) private Integer id; @NotNull(message = "Product name must not be null") @NotEmpty private String name; @ManyToOne @JoinColumn(name="category_id") private Category category; @ManyToMany(mappedBy = "productlist") private List<OrderDetail> orderDetail =new ArrayList<OrderDetail>(); //getters setter OrderDetail Table @Entity public class OrderDetail { @Id @GeneratedValue(strategy =

Is there a way to use constants inside Spring Data @Query annotation value?

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问题 I don't want to hardcode constant values, I would rather specify them through a reference variable. For example, rather then writing the next query: @Query(value = "SELECT u FROM UserModel u WHERE u.status = 1") ..I would like to extract the hardcoded value '1' and write something like: @Query(value = "SELECT u FROM UserModel u WHERE u.status = UserModel.STATUS_ACTIVE") //doesn't compile Is there a way to specify constants like in the second example inside spring-data queries? 回答1: You have

Fetch List Using DTO projections using a Constructor Expression and JPQL

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Perform a search on DisabScreenRequest and fetch its child details also. Using DTO projections using a Constructor Expression and JPQL. The parent entity with a child table. @Entity @Table(name = "SCREEN_REQUEST") public class DisabScreenRequest implements Serializable { private static final long serialVersionUID = 1L; @Id private long requestId; @Column(name = "CIVILID") private Long civilId; @ManyToMany() @JoinTable(name = "_DISAB_SCREEN_REQ_DETAILS", joinColumns = { @JoinColumn(name = "REQUEST_ID") }, inverseJoinColumns = { @JoinColumn(name = "DISABILTY_TYPE_ID") }) private Set<DisabMaster>

How to query a property of type List<String>in JPA

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问题 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 =

Ordering a join fetched collection in JPA using JPQL/HQL

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Given the below JPQL statement, how do I modify it so that the kittens in the resulting list are ordered by their age property? SELECT c FROM Cat c left join fetch c.kittens WHERE c.id = :id I've tried multiple approches but without any luck. This is esentially what I would like to do, but it doesn't work: SELECT c FROM Cat c left join fetch c.kittens k WHERE c.id = :id ORDER BY k.age Hej, I don't think this is possible when applied using queries. But as far as I remember, you can use this to add default ordering to your collection in the mapping: @OrderBy("myColumName asc") In addition to

JPQL limit query [duplicate]

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问题 This question already has answers here : Limit number of results in JPQL (2 answers) Closed 3 years ago . 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

Name for parameter binding must not be null or empty! For named parameters you need to use @Param for query method parameters on Java versions

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This has been posted before but my issue is a little different. This is the JPQL query in question: @Query("SELECT NEW com.htd.domain.ShopOrder(po.id, po.po_number, " + "po.due_date, po_part.id, po_part.part_quantity, " + "part.id, part.part_number, part.part_description, " + "part.plasma_hrs_per_part, part.grind_hrs_per_part, " + "part.mill_hrs_per_part, part.brakepress_hrs_per_part) " + "FROM Po po " + "LEFT JOIN po.partList po_part " + "LEFT JOIN po_part.part part " + "LEFT JOIN po_part.part where po.id = :id") List<ShopOrder> getShopOrder(long id); Now I did try to do: @Query("SELECT NEW

java.sql.SQLException: Fail to convert to internal representation

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I'm trying execute following query: String query = "select entity, entity.id from Site entity"; List resultList = entityManager.createQuery(query).getResultList(); And take exception: [...] Caused by: java.sql.SQLException: Fail to convert to internal representation at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:208) at oracle.jdbc.driver.CharCommonAccessor.getLong(CharCommonAccessor.java:239) at oracle.jdbc.driver

JPQL and Join Table

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问题 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

TypedQuery instead of normal Query in JPA

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Is it possible to write this Query as a TypedQuery and let the two Long's run into a Object with two public Long fields inside. Query q = em.createQuery( "SELECT c.id, COUNT(t.id) " + "FROM PubText t " + "JOIN t.comm c " + "WHERE c.element = ?1 " + "GROUP BY c.id"); q.setParameter(1, e); List<?> rl = q.getResultList(); Iterator<?> it = rl.iterator(); HashMap<Long, Long> res = new HashMap<Long, Long>(); while (it.hasNext()) { Object[] n = (Object[]) it.next(); res.put((Long)n[0], (Long)n[1]); } return res; JPA has a feature just for this - constructor expressions: Query q = entityManager