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Difference between revisions of "EclipseLink/UserGuide/JPA/Basic JPA Development/Querying/Native"

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{{EclipseLink_UserGuide|info=n}}
 
=EclipseLink Native Query=
 
=EclipseLink Native Query=
  
 
In addition to [[EclipseLink/UserGuide/JPA/Basic JPA Development/Querying/JPQL|JPQL]], EclipseLink rich native DatabaseQuery and Expression criteria API.
 
In addition to [[EclipseLink/UserGuide/JPA/Basic JPA Development/Querying/JPQL|JPQL]], EclipseLink rich native DatabaseQuery and Expression criteria API.
 
{{EclipseLink_API
 
|api=
 
*[http://www.eclipse.org/eclipselink/api/org/eclipse/persistence/queries/package-frame.html org.eclipse.persistence.queries]
 
*[http://www.eclipse.org/eclipselink/api/org/eclipse/persistence/expressions/package-frame.html org.eclipse.persistence.expressions]
 
}}
 
  
 
For additional information on EclipseLink native queries, see [[EclipseLink/UserGuide/Queries_(ELUG)|Queries]] in the ''EclipseLink User's Guide''.
 
For additional information on EclipseLink native queries, see [[EclipseLink/UserGuide/Queries_(ELUG)|Queries]] in the ''EclipseLink User's Guide''.

Revision as of 14:31, 18 June 2010



EclipseLink Native Query

In addition to JPQL, EclipseLink rich native DatabaseQuery and Expression criteria API.

For additional information on EclipseLink native queries, see Queries in the EclipseLink User's Guide.


Using JpaEntityManager createQuery() API

import javax.persistence.Query;
import org.eclipse.persistence.expressions.*;
import org.eclipse.persistence.queries.ReadAllQuery;
 
ExpressionBuilder builder = new ExpressionBuilder();
ReadAllQuery databaseQuery = new ReadAllQuery(Employee.class, builder);
databaseQuery.setSelectionCriteria(builder.get("firstName").like("B%"));
databaseQuery.addOrdering(builder.get("firstName").toUpperCase());
 
Query query = ((JpaEntityManager)entityManager.getDelegate()).createQuery(databaseQuery);
List result = query.getResultList();

Elug note icon.png

Note: The JpaEntityManager API was added in EclipseLink 1.1.

In EclipseLink 1.0, the JpaQuery method setDatabaseQuery() could be used.


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