| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.openjpa.persistence.jdbc.query; |
| |
| import java.util.List; |
| |
| import javax.persistence.EntityManager; |
| import javax.persistence.Query; |
| |
| import org.apache.openjpa.jdbc.conf.JDBCConfiguration; |
| import org.apache.openjpa.jdbc.sql.DBDictionary; |
| import org.apache.openjpa.jdbc.sql.MariaDBDictionary; |
| import org.apache.openjpa.jdbc.sql.MySQLDictionary; |
| import org.apache.openjpa.jdbc.sql.OracleDictionary; |
| import org.apache.openjpa.persistence.jdbc.query.domain.TimeKeeper; |
| import org.apache.openjpa.persistence.test.SQLListenerTestCase; |
| |
| /** |
| * Tests database-specific query hints. |
| */ |
| public class TestHintedQuery extends SQLListenerTestCase { |
| |
| @Override |
| public void setUp() { |
| super.setUp(CLEAR_TABLES, |
| "openjpa.jdbc.DBDictionary", "(defaultFractionLength=6)", |
| TimeKeeper.class); |
| } |
| |
| public void testHintedQuery() { |
| EntityManager em = emf.createEntityManager(); |
| em.getTransaction().begin(); |
| em.persist(new TimeKeeper()); |
| em.persist(new TimeKeeper()); |
| em.getTransaction().commit(); |
| |
| String jpql = "SELECT tk FROM TimeKeeper tk"; |
| String mariadbHint = "SQL_NO_CACHE"; |
| String mysqlHint = "SQL_NO_CACHE"; |
| String oracleHint = "/*+ first_rows(100) */"; |
| Query query = em.createQuery(jpql); |
| query.setHint(MariaDBDictionary.SELECT_HINT, mariadbHint); |
| query.setHint(MySQLDictionary.SELECT_HINT, mysqlHint); |
| query.setHint(OracleDictionary.SELECT_HINT, oracleHint); |
| List keepers = query.getResultList(); |
| assertEquals(2, keepers.size()); |
| |
| // The dictionaries the hints are meant for should use the hints. |
| // Other dictionaries should ignore them. |
| DBDictionary dict = ((JDBCConfiguration) emf.getConfiguration()) |
| .getDBDictionaryInstance(); |
| if (dict instanceof MariaDBDictionary) { |
| assertContainsSQL("SELECT " + mariadbHint + " "); |
| return; |
| } |
| if (dict instanceof MySQLDictionary) { |
| assertContainsSQL("SELECT " + mysqlHint + " "); |
| return; |
| } |
| if (dict instanceof OracleDictionary) { |
| assertContainsSQL("SELECT " + oracleHint + " "); |
| return; |
| } |
| assertNotSQL(".*" + mariadbHint + ".*"); |
| assertNotSQL(".*" + mysqlHint + ".*"); |
| assertNotSQL(".*" + oracleHint + ".*"); |
| } |
| } |