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

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Revision as of 15:55, 12 January 2011

EclipseLink JPA

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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.


Eclipselink-logo.gif
Version: 2.2.0 DRAFT
Other versions...