DB2Dialect.java |
1 /** 2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved. 3 * 4 * The contents of this file are subject to the terms of the Liferay Enterprise 5 * Subscription License ("License"). You may not use this file except in 6 * compliance with the License. You can obtain a copy of the License by 7 * contacting Liferay, Inc. See the License for the specific language governing 8 * permissions and limitations under the License, including but not limited to 9 * distribution rights of the Software. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 12 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 13 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 14 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 15 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 17 * SOFTWARE. 18 */ 19 20 package com.liferay.portal.dao.orm.hibernate; 21 22 /** 23 * <a href="DB2Dialect.java.html"><b><i>View Source</i></b></a> 24 * 25 * @author Shepherd Ching 26 * @author Jian Cao 27 * 28 */ 29 public class DB2Dialect extends org.hibernate.dialect.DB2Dialect { 30 31 public String getLimitString(String sql, boolean hasOffset) { 32 if (!sql.startsWith("(")) { 33 return super.getLimitString(sql, hasOffset); 34 } 35 36 StringBuilder sb = new StringBuilder(); 37 38 sb.append("select cursor1.* from ("); 39 sb.append("select rownumber() over() as rownumber_, cursor2.* from ("); 40 sb.append(sql); 41 sb.append(") as cursor2) as cursor1 where rownumber_"); 42 43 if (hasOffset) { 44 sb.append(" between ? + 1 and ?"); 45 } 46 else { 47 sb.append(" <= ?"); 48 } 49 50 return sb.toString(); 51 } 52 53 }