Criteria api - illegalStateException
I've written following code by using Criteria Api:
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery<Entity> criteriaQuery = criteriaBuilder.createQuery(Entity.class);
Root<Entity> root = criteriaQuery.from(Entity.class);
criteriaQuery.select(root);
CriteriaQuery<Long> countQuery = criteriaBuilder.createQuery(Long.class);
countQuery.select(criteriaBuilder.count(root));
Long countOfRows = entityManager.createQuery(countQuery).getSingleResult();
As a result I get an exception:
java.lang.IllegalStateException: No criteria query roots were
specified
The exception is thrown by getSingleResult method (last line of the code). Thank you for help!
java hibernate criteria-api
asked Nov 28 '18 at 1:59
WojtekWojtek
184
add a comment |
I've written following code by using Criteria Api:
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery<Entity> criteriaQuery = criteriaBuilder.createQuery(Entity.class);
Root<Entity> root = criteriaQuery.from(Entity.class);
criteriaQuery.select(root);
CriteriaQuery<Long> countQuery = criteriaBuilder.createQuery(Long.class);
countQuery.select(criteriaBuilder.count(root));
Long countOfRows = entityManager.createQuery(countQuery).getSingleResult();
As a result I get an exception:
java.lang.IllegalStateException: No criteria query roots were
specified
The exception is thrown by getSingleResult method (last line of the code). Thank you for help!
java hibernate criteria-api
asked Nov 28 '18 at 1:59
WojtekWojtek
184
add a comment |
I've written following code by using Criteria Api:
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery<Entity> criteriaQuery = criteriaBuilder.createQuery(Entity.class);
Root<Entity> root = criteriaQuery.from(Entity.class);
criteriaQuery.select(root);
CriteriaQuery<Long> countQuery = criteriaBuilder.createQuery(Long.class);
countQuery.select(criteriaBuilder.count(root));
Long countOfRows = entityManager.createQuery(countQuery).getSingleResult();
As a result I get an exception:
java.lang.IllegalStateException: No criteria query roots were
specified
The exception is thrown by getSingleResult method (last line of the code). Thank you for help!
java hibernate criteria-api
asked Nov 28 '18 at 1:59
WojtekWojtek
184
I've written following code by using Criteria Api:
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery<Entity> criteriaQuery = criteriaBuilder.createQuery(Entity.class);
Root<Entity> root = criteriaQuery.from(Entity.class);
criteriaQuery.select(root);
CriteriaQuery<Long> countQuery = criteriaBuilder.createQuery(Long.class);
countQuery.select(criteriaBuilder.count(root));
Long countOfRows = entityManager.createQuery(countQuery).getSingleResult();
As a result I get an exception:
java.lang.IllegalStateException: No criteria query roots were
specified
The exception is thrown by getSingleResult method (last line of the code). Thank you for help!
java hibernate criteria-api
java hibernate criteria-api
asked Nov 28 '18 at 1:59
WojtekWojtek
184
asked Nov 28 '18 at 1:59
WojtekWojtek
184
edited Nov 28 '18 at 2:19
Wojtek
asked Nov 28 '18 at 1:59
WojtekWojtek
184
asked Nov 28 '18 at 1:59
WojtekWojtek
184
asked Nov 28 '18 at 1:59
WojtekWojtek
184
184
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
It works after forcing countQuery to add root:
((QueryStructure)((CriteriaQueryImpl)countQuery).queryStructure).roots.add(root)
answered Nov 28 '18 at 8:29
WojtekWojtek
184
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
It works after forcing countQuery to add root:
((QueryStructure)((CriteriaQueryImpl)countQuery).queryStructure).roots.add(root)
answered Nov 28 '18 at 8:29
WojtekWojtek
184
add a comment |
It works after forcing countQuery to add root:
((QueryStructure)((CriteriaQueryImpl)countQuery).queryStructure).roots.add(root)
answered Nov 28 '18 at 8:29
WojtekWojtek
184
add a comment |
It works after forcing countQuery to add root:
((QueryStructure)((CriteriaQueryImpl)countQuery).queryStructure).roots.add(root)
answered Nov 28 '18 at 8:29
WojtekWojtek
184
It works after forcing countQuery to add root:
((QueryStructure)((CriteriaQueryImpl)countQuery).queryStructure).roots.add(root)
answered Nov 28 '18 at 8:29
WojtekWojtek
184
answered Nov 28 '18 at 8:29
WojtekWojtek
184
answered Nov 28 '18 at 8:29
WojtekWojtek
184
answered Nov 28 '18 at 8:29
WojtekWojtek
184
184
add a comment |
add a comment |
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