Hi all, I have two entities: Student and Course with manytomany relationship. I wanna give a student a list of the courses he did not choose yet. For example, If we have 6 courses, and stduent A has selected course 1 , 3, 5, we should list course 2,4 in the available courses list for him. What's the right JPQL for that? Thanks. ...
Hi, I would like to retrieve many 'Access' which have one 'Role' in common. It's the Named Querie SELECT access FROM Access AS access WHERE :role MEMBER OF access.listRole The Access Entity public class Access implements Serializable { @Id @GeneratedValue(strategy=GenerationType.AUTO) private Long id; private String...
I am stuck trying to construct a JPQL query and was hoping someone with more JPA experience than mine could help. Consider the following two entities: class Author{ String name @OneToMany(mappedBy="author") Set<Book> books } class Book{ String title Boolean inPrint @ManyToOne Author author } If I want to return a spec...
Hi I m using JPQL to retrieve data. I can get data using the statement List persons = null; persons = em.createQuery("select p.albumName from PhotoAlbum p , Roleuser r where r = p.userId and r.userID = 1"); Now i can get the album names using this... int i=0; for (i=0;i<persons.size(); i++) { System.out.println("Testing n "...
I'm having problem on JPA (Hibernate) Fetch Join : Here is my JPQL query SELECT n FROM News n LEFT JOIN FETCH n.profiles AS pr WHERE pr.id=?1 But it's not working. How can I make a query that filters on the list that is being fetched ? ...
I'm trying to write a JPQL Query with an ORDER BY clause: query = "SELECT c FROM item ORDER BY c.name ASC" I would like to set an "order" parameter, whose value would be either "ASC" or "DESC": query = "SELECT c FROM item ORDER BY c.name :order" And then in my implementation: query.setParameter("order", "ASC"); This is when I ge...
It is possible to do the equivalent of this sql query in JPQL? SELECT * FROM COUNTRIES c WHERE COUNTRY_ID IN ( SELECT DISTINCT COUNTRY_ID FROM PORTS p WHERE p.COUNTRY_ID = c.COUNTRY_ID AND STATE = 'A' ) ...
I need to assign the result of a jpql result to a simple class java object I have something like this class myObject() { @id private Long id; private String Name; private String description; ... //getters and setters } I need to somehow to store the result of this SQL query, example // could be anytable SELECT DISTINCT c.table_i...
Does JPA 2 have any mechanism for running recursive queries? Here's my situation: I have an entity E, which contains an integer field x. It also may have children of type E, mapped via @OneToMany. What I'd like to do is find an E by primary key, and get its value of x, along with the x values of all its descendants. Is there any way to ...
Hello, I have two entities User and Group: @Entity public class User implements Serializable { private static final long serialVersionUID = 1L; @Id private String username; private String password; private String email; @ManyToMany @JoinTable(name="user_group", joinColumns={@JoinColumn(name="USERNAME")}, inv...
Imagine a table emp: CREATE TABLE emp ( id NUMBER , name VARCHAR , dept_code VARCHAR ) and a table dept: CREATE TABLE dept ( code VARCHAR , name VARCHAR ) emp.dept_code references dept.code as a ForeignKey. These tables are mapped to JPA Entities, and the ForeignKey is modeled as an association...
I am trying to execute a pretty-sophisticated query on a string field in the database. I am not very experienced at JPQL, so I thought I would try to get some help. I have a field in the database called FILE_PATH. Within the FILE_PATH field, there will be values such as: 'C:\temp\files\filename.txt' 'file:\\\C:\testing\testfolder\inn...
Can JPQL execute LIKE expressions against enums? If I have an entity Foo with an enum field bar I can execute the following in MySQL(bar is stored as a MySQL enum)... SELECT * FROM Foo WHERE `bar` LIKE '%SUFFIX' However, the corresponding query in JPQL... SELECT f FROM Foo f WHERE f.bar LIKE '%SUFFIX' ...complains that... Param...
How can I write a JPA query using MONTH function just like sql query? @NamedQuery(name="querybymonth", query="select t from table1 t where MONTH(c_Date) = 5") When I use the above pattern for query, I get an error: unexpected token - MONTH. ...
I have a JPQL query that works fine with MySQL and SQL Server. But with Oracle it fails with ORA-00932: inconsistent datatypes: expected - got CLOB. The reason seems to be that Oracle does not support ORDER BY with CLOB columns. Is there any JPQL work around for this? ...
This seems like it should be a pretty simple question, or at least have a simple answer. But - I'm really not a database guy, and I'm still pretty far down on the Hibernate learning curve. That said, here's the setup: Consider a unidirectional many-to-many relationship between two entities, from Foo to Bar: (pardon any typos below, th...
I thought I know how to JOIN in JPQL but apparently not. Can anyone help me? select b.fname, b.lname from Users b JOIN Groups c where c.groupName = :groupName This give me Exception org.eclipse.persistence.exceptions.JPQLException Exception Description: Syntax error parsing the query Internal Exception: org.eclipse.persistence.intern...
I have the following entities: @Entity @Inheritance(strategy=InheritanceType.SINGLE_TABLE) @DiscriminatorColumn(name="orderType", discriminatorType=DiscriminatorType.STRING) @DiscriminatorValue(value="BASE") @Table(name = "orders") public class OrderEntity implements Serializable { ... and @Entity @DiscriminatorValue(value="RECURRING...
Hi, Im learning JPA and having problems. My main problem is when i join my entitys and dont quite understand why im getting the results i am .. and its realy slowing my progress if someone could help i would be very greatful. Entitys College @Entity @NamedQueries({ @NamedQuery(name=College.allCollegeQuery,query="SELECT col FROM C...
I am using Hibernate JPA implementation org.hibernate:hibernate-entitymanager:3.4.0.GA at central maven repo. I have two classes. Class A extends Class B When I execute a query like "SELECT b FROM B b", the result list, as expected, contains Class A instances too. Is there a way to retrieve only the Class B instances without any fie...