38 | Criteria Query Selection and Results and for representing query results as tuples. SELECT Clause Elements The content of the SELECT ... . Query Results as Tuples JPA 2 introduces a new way to represent multi selection results (i.e. results of a query with multiple expressions in the SELECT clause) using tuples: The Tuple interface |
33 | ClassCastException in Tuple.get(); CriteriaQuery<Tuple> cq = cb.createTupleQuery(); Root<DemandAnswer> rootDemandAnswer = cq ... (joinProvidingPerson, storedProvidingPerson) ); TypedQuery<Tuple> query = em.createQuery(cq); List<Tuple> tuples = query.getResultList(); List<DemandDetails> candidateDemands = Lists |
30 | WHERE clause (JPQL / Criteria API) defines iteration on tuples. In this case the WHERE clause filters tuples before passing ... the WHERE clause are passed through to the SELECT. In multi-variable queries the number of tuples |
30 | GROUP BY and HAVING clauses clause. When a GROUP BY clause exists in a JPQL query, database objects (or tuples of database objects ... calculations (count, sum, avg, max, min) that are carried out on all the objects (or the object tuples) in ... clause in which all the FROM/WHERE objects (or object tuples) are considered as one group. For example |
17 | JPA Query Structure (JPQL / Criteria), multiselect, array, tuple, construct). Criteria FROM (from, join, fetch). Criteria WHERE (where). Criteria |
17 | JPA Queries three groups. SELECT and ORDER BY elements (including tuples): FROM clause elements (representing range |
17 | Paths and Types in JPQL and Criteria API, the current FROM variable (or FROM tuple when there are multiple variables) is simply skipped |
17 | JPA Criteria API Queries in the following page sections: SELECT clause (select, distinct, multiselect, array, tuple, construct |
17 | javax.persistence.criteria.CriteriaBuilder compound selection Throws: IllegalArgumentException - if an argument is a tuple- or array-valued ... selection item Throws: IllegalArgumentException - if an argument is a tuple- or array-valued selection ... : criteria query object Since: JPA 2.0 CriteriaQuery< Tuple> createTupleQuery() Create a CriteriaQuery object |
13 | javax.persistence.TupleElement that is returned in a query result tuple. Since: JPA 2.0 See Also: Tuple String getAlias() Return the alias assigned to the tuple element or null, if no alias has been assigned. Return the alias assigned to the tuple element or null, if no alias has been assigned. Returns: alias Since: JPA 2.0 |
