jpa-criteria

问题 I'm trying to retrieve data out of a legacy database. The column in the table is defined as a DECIMAL(13,0) containing account numbers. The column data type cannot be changed as it will have a major impact on the legacy system. Essentially all programs using the table need to be changed and then recompiled which is not an option. We have a requirement to find all records where the account number contains a value, for example the user could search for 12345 and all accounts with an account

问题 I'm trying to retrieve data out of a legacy database. The column in the table is defined as a DECIMAL(13,0) containing account numbers. The column data type cannot be changed as it will have a major impact on the legacy system. Essentially all programs using the table need to be changed and then recompiled which is not an option. We have a requirement to find all records where the account number contains a value, for example the user could search for 12345 and all accounts with an account

问题 I used JPA CriteriaQuery to build my dynamic Query and pass in a Spring Data Pageable object: sort=name,desc At the backend I have a method in my Repository to support dynamic query: public Page<User> findByCriteria(String username, Pageable page) { CriteriaBuilder cb = em.getCriteriaBuilder(); CriteriaQuery<User> cq = cb.createQuery(User.class); Root<User> iRoot = cq.from(User.class); List<Predicate> predicates = new ArrayList<Predicate>(); if (StringUtils.isNotEmpty(username)) { predicates

问题 I used JPA CriteriaQuery to build my dynamic Query and pass in a Spring Data Pageable object: sort=name,desc At the backend I have a method in my Repository to support dynamic query: public Page<User> findByCriteria(String username, Pageable page) { CriteriaBuilder cb = em.getCriteriaBuilder(); CriteriaQuery<User> cq = cb.createQuery(User.class); Root<User> iRoot = cq.from(User.class); List<Predicate> predicates = new ArrayList<Predicate>(); if (StringUtils.isNotEmpty(username)) { predicates

问题 Spring Boot here. I'm trying to wrap my head around JpaRepositories and Specifications when used in the context of implementing complex queries and am struggling to see the "forest through the trees" on several items. A canonical example of a Specification is as follows: public class PersonSpecification implements Specification<Person> { private Person filter; public PersonSpecification(Person filter) { super(); this.filter = filter; } public Predicate toPredicate(Root<Person> root,

问题 WITH cte AS ( select A.A_ID, B.Lib, A.Lib, C.Lib, (SELECT count(*) FROM X WHERE A.A_ID = X.A_ID) AS countX, (SELECT count(*) FROM Y WHERE A.A_ID = Y.A_ID) AS countY, (SELECT count(*) FROM Z WHERE A.A_ID = Z.A_ID) AS countZ from A left outer join C on A.C_ID=C.C_ID left outer join B on A.B_ID=B.B_ID ) select * from cte where countX = 2 AND countY = 3 Order BY countZ DESC; I know how to create the sql query inside the CTE but I don't have any idea how to create the CTE in JPA Criteria API (

问题 The code example: @Entity public class Event { @Id @GeneratedValue private Long id; private String name; @OneToMany(mappedBy="event") private List<Actions> actions; } @Entity public class Action { @Id @GeneratedValue private Long id; private String name; private Date date; @ManyToOne @JoinColumn(name = "event_id") private Event event; } public class EventSpecification { public static Specification<Event> findByCriteria(EventSearchCriteria criteria) { return (root, criteriaQuery,

问题 In my entity I have two fields : private LocalDate startDate = LocalDate.of(1900, 1, 1); private LocalDate endDate = LocalDate.of(3000, 1, 1); Using JPA Criteria API I want to select entities where LocalDate.now() > startDate and LocalDate.now() < endDate . I tried as following : predicates.add(builder.greaterThan(LocalDate.now(), path.<LocalDate> get(Entity_.startDate))); predicates.add(builder.lessThan(builder.currentDate(), path.<LocalDate> get(Entity_.endDate))); But I get this error :

问题 I need to pass in a variable number of parameters to a spring/JPA repo to mimick something like this. select * from myTable where name like '%SOME_VALUE%' or name like '%SOME_OTHER_VALUE%' or name like '%SOME_OTHER_VALUE2%' or an unknown number of other values So far I haven't been able to determine what the correct way to to do this is. I'm using Spring 4.3.7, Hibernate 5.2.9, and Spring Data 1.11.1. I've googled around and it doesn't appear that there's way to do this with a normal CRUD

问题 I have a scenario where i use a custom user type for a entity field in hibernate using the org.hibernate.usertype.UserType . It's a date conversion to UTC import org.hibernate.usertype.ParameterizedType; import org.hibernate.usertype.UserType; public final class UTCTimestampType implements ParameterizedType, UserType {..} My entity class is like the below @Entity public class Person extends AbstractPerson { @Column(name = "BIRTH_DT_TM") @Type(type = "com.myexample.hibernate.types