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  }