I need to do this SQL query with detachedCriteria:
SELECT g.id FROM games g
WHERE NOT EXISTS (
SELECT 1 FROM users_games ug WHERE ug.user_id = 1 AND g.id = ug.game_id)
The idea is to get the ids from the games that aren't owned by the user.
I tried like 10 different approaches with detachedCriteria but I get the "Unknown entity: null" MappingException
The code should look like:
DetachedCriteria subquery = DetachedCriteria.forClass(UserGame.class, "ug")
.add(Restrictions.eq("ug.user.id", 1))
.add(Restrictions.eqProperty("ug.game.id","u.id"));
DetachedCriteria criteria = DetachedCriteria.forClass(Game.class, "g")
.add(Subqueries.notExists(subquery));
Setting also the projections to return only the id of the games.
Any ideas?
I think Hibernate has some trouble joining the queries with no alias.
Adding alias works but the results are quite wrong.
You need to add an alias, as follows:
DetachedCriteria subquery = DetachedCriteria.forClass(UserGame.class, "ug")
.addAlias("ug.user", "user")
.add(Restrictions.eq("user.id", 1))
.addAlias("ug.game", "game")
.add(Restrictions.eqProperty("game.id","u.id"));
That should help
You need a projection and specifies which attribute that needs to be matched.
DetachedCriteria subquery = DetachedCriteria.forClass(UserGame.class, "ug")
.add(Restrictions.eq("ug.user.id", 1))
.add(Restrictions.eqProperty("ug.game.id","u.id"))
.setProjection(Projections.property("ug.game.id"));
DetachedCriteria criteria = DetachedCriteria.forClass(Game.class, "g")
.add(Property.forName("g.id").notIn(subquery));
I hope that helps.
Try
SELECT g.id FROM users_games ug join ug.game g
WHERE NOT EXISTS (SELECT 1 FROM WHERE ug.user_id = 1)
Related
I have this diagram:
table diagram
and I want to filter by the employees that have a project.
In normal SQL I will go like this
select * from employees e
join employee_projects ep on ep.employee_id = e.id
How can I achieve the same with Hibernate?
I tried using criteria builder and specifications but I can't get the data from the join table.
You can select all employees that have a project like this
em.createQuery(
"SELECT e FROM Employee e JOIN e.projects p WHERE p IS NOT NULL", Employee.class).getResultList()
You can join tables using join method of root object.
try something like this below
I have used it for one to many relation
Join<Post, Tag> join = root.join("tags", JoinType.INNER);
Predicate tagPredicate = criteriaBuilder.like(join.get("name"), "%" + search + "%");
for many to many relation,
Join<Post, Tag> postTagsTable = root.join("tags", JoinType.INNER);
return postTagsTable.<String>get("name").in(tagNames);
here I have tags field in Post entity, which is used inside join
I'm relatively new to Spring JPA CriteriaQuery. Im trying to convert my old native query in my program to criteria query and haven't been successful on join query for multiple table with conditions. I need help converting native SQL query into Criteria Query for these query below :
select * from student s inner join (
select distinct on (student_id) * from class where status = 'Active' order by
student_id,date_register desc) c on s.id = c.user_id
inner join teacher t on t.subject_id = c.subject_id
where t.status = 'Active' and s.status='Active' order by s.name desc
Update :
Below code is as far as I can go cause I dont really know much. Am i in the right direction? I'm opting for Expression because i dont know how to use Join.
CriteriaQuery<Student> query = cb.createQuery(Student.class);
Root<Student> sRoot= query.from(Student.class);
query.select(sRoot);
Subquery<Integer> subquery = query.subquery(Integer.class);
Root<Class> cRoot= subquery.from(CLass.class);
Expression<Integer> max = cb.max(cRoot.get("dateRegister"));
subquery.select(max);
subquery.groupBy(cRoot.get("student"));
query.where(
cb.and(
cb.in(cRoot.get("dateRegister")).value(subquery)
)
);
Thanks in advance!
I'd like to know how to make a query in JPA where content is not inside a "third table" responsible to make relationship manyToMany.
example:
SELECT id FROM A WHERE id NOT IN (SELECT id FROM A_B WHERE idB = #id)
In this case I have Table A, Table B, and the relationShip manytomany A_B
I tried with CriteriaQuery and subquery, but it didn't work. Actually, it returned none result.
Does somebody have any example for this case?
I got my solution!
I don't know if it is completely correct, so, if someone see an error, please let me know.
The end query, created by JPA become this:
select maingroup0_.GroupId as GroupId1_, maingroup0_.idGroupAttendanceType as idGroupA2_1_, maingroup0_.name as name1_ from TUnPbxGroup maingroup0_ where maingroup0_.GroupId not in (select maingroup1_.GroupId from TUnPbxGroup maingroup1_ inner join THolidayGroup listholida2_ on maingroup1_.GroupId=listholida2_.GroupId inner join THoliday holiday3_ on listholida2_.IdHoliday=holiday3_.IdHoliday where holiday3_.IdHoliday=2)
The code:
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<MainGroup> query = cb.createQuery(MainGroup.class);
Root<MainGroup> root = query.from(MainGroup.class);
query.select(root);
Subquery<Long> subquery = query.subquery(Long.class);
Root<MainGroup> subRoot = subquery.from(MainGroup.class);
subquery.select(subRoot.<Long>get("id"));
Join<Holiday, Holiday> maingroups = subRoot.join("listHolidays");
subquery.where(cb.equal(maingroups.get("id"), holidayId));
query.where(cb.not(cb.in(root.get("id")).value(subquery)));
TypedQuery<MainGroup> typedQuery = em.createQuery(query);
List<MainGroup> result = typedQuery.getResultList();
Can anybody give me some hints on how to put that kind of subquery in a CriteriaQuery? (I'm using JPA 2.0 - Hibernate 4.x)
SELECT a, b, c FROM tableA WHERE a = (SELECT d FROM tableB WHERE tableB.id = 3) - the second select will always get a single result or null.
Try something like the following example to create a subquery:
CriteriaQuery<Object[]> cq = cb.createQuery(Object[].class);
Root tableA = cq.from(TableA.class);
Subquery<String> sq = cq.subquery(TableB.class);
Root tableB = cq.from(TableB.class);
sq.select(tableB.get("d"));
sq.where(cb.equal(tableB.get("id"), 3));
cq.multiselect(
cb.get("a"),
cb.get("b"),
cb.get("c"));
cq.where(cb.equal(tableA.get("a"), sq));
List<Object[]> = em.createQuery(cq).getResultList();
Note the code has not been tested due to the lack of an IDE nearby.
You can use DetachedCriteria to represend the sub-query. Your code should look something like:
DetachedCriteria subCriteria = DetachedCriteria.forClass(TableB.class);
subCriteria.add(Property.forName("id").eq(3)); //WHERE tableB.id = 3
subCriteria.setProjection(Projections.property("d")); // SELECT d from
DetachedCriteria criteria = DetachedCriteria.forClass(getPersistentClass());
criteria.add(Property.forName("a").eq(subCriteria)); //a = (sub-query)
criteria.setProjection(Projections.property("a"); //SELECT a
criteria.setProjection(Projections.property("b"); //SELECT b
criteria.setProjection(Projections.property("c"); //SELECT c
return getHibernateTemplate().findByCriteria(criteria);
Hello guy's having a bit of a problem writing a subselect query with criteria API
sublselect should take a parameter from selected q
SELECT c.file_id as fid, s.person as person, s.fax_no as fax, s.phone_no as phone,(SELECT SUM( b.ammount )
FROM billing b
WHERE b.constants_file_id = c.file_id
) - (
SELECT
CASE
WHEN b.partioa_pay IS NULL
THEN "0"
ELSE SUM( b.partioa_pay )
END
FROM billing b
WHERE b.constants_file_id = c.file_id ) AS totalout
FROM constants c
LEFT JOIN firm_management s ON c.firm_management_firm_managment_id = s.firm_managment_id
WHERE s.firm_managment_id = ?
As you can see the totalout suselected against c.file_id
I was playing with this for 2 days with no luck maby sombody in stackoverflow community who has a strong java and hibernate knowledge would be able to help me..
This is what I got getting exeption 2012-01-17 01:48:06,808 ERROR [org.hibernate.util.JDBCExceptionReporter] - (session F2C61D08758E0AA09CA6C99A5B6F2145, thread 113 invoke ByDefenceFirm.getByDefenceFirm)
Criteria crit = session.createCriteria(Constants.class, "co");
crit.createAlias("co.provider", "pr", Criteria.INNER_JOIN)
.createAlias("co.firmManagement", "ins", Criteria.LEFT_JOIN)
.createAlias("co.law", "lw", Criteria.LEFT_JOIN)
.createAlias("co.billing", "bl", Criteria.LEFT_JOIN)
.setProjection(Projections.projectionList()
.add(Projections.property("co.fileId"))
.add(Projections.property("co.status"))
.add(Projections.property("co.asi"))
.add(Projections.property("pr.name"))
.add(Projections.property("ins.companyName"))
.add(Projections.property("lw.shortName")));
DetachedCriteria valueCrit = DetachedCriteria.forClass(Billing.class, "bl")
.setProjection(Projections.sum("bl.ammount"))
.setProjection(Projections.property("bl.constants"))
.add(Restrictions.eqProperty("bl.constants", "co.fileId"));
crit.add(Property.forName("co.fileId").eq(valueCrit));
crit.setProjection(Projections.property("co.billing"));
crit.add(Restrictions.eq("lw.lawOfficeId", prid));
resultList = crit.list();
If anybody have any suggestions would really appreciated it.
A subselect in the select clause is impossible with Criteria. You'll have to go with a HQL or a SQL query.
It is possible. At least now with the current version of Hibernate. Use "Restrictions.sqlRestriction()".
For example:
Criteria accountCriteria = getCurrentSession().createCriteria(Account.class);
accountCriteria.add(Restrictions.sqlRestriction("{alias}.field IN (SELECT ......)"));
#SuppressWarnings("unchecked")
List<Account> accounts = accountCriteria.list();
Sorry, I didn't read the question carefully. Your scenario is different.