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1   /*
2    *
3    * The DbUnit Database Testing Framework
4    * Copyright (C)2002-2004, DbUnit.org
5    *
6    * This library is free software; you can redistribute it and/or
7    * modify it under the terms of the GNU Lesser General Public
8    * License as published by the Free Software Foundation; either
9    * version 2.1 of the License, or (at your option) any later version.
10   *
11   * This library is distributed in the hope that it will be useful,
12   * but WITHOUT ANY WARRANTY; without even the implied warranty of
13   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14   * Lesser General Public License for more details.
15   *
16   * You should have received a copy of the GNU Lesser General Public
17   * License along with this library; if not, write to the Free Software
18   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19   *
20   */
21  
22  package org.dbunit.operation;
23  
24  import org.slf4j.Logger;
25  import org.slf4j.LoggerFactory;
26  
27  import org.dbunit.DatabaseUnitException;
28  import org.dbunit.database.DatabaseConfig;
29  import org.dbunit.database.IDatabaseConnection;
30  import org.dbunit.dataset.IDataSet;
31  
32  import java.sql.SQLException;
33  
34  /**
35   * Truncate tables present in the specified dataset. If the dataset does not
36   * contains a particular table, but that table exists in the database,
37   * the database table is not affected. Table are truncated in
38   * reverse sequence.
39   * <p>
40   * This operation has the same effect of as {@link DeleteAllOperation}.
41   * TruncateTableOperation is faster, and it is non-logged, meaning it cannot be
42   * rollback. DeleteAllOperation is more portable because not all database vendor
43   * support TRUNCATE_TABLE TABLE statement.
44   *
45   * @author Manuel Laflamme
46   * @since Apr 10, 2003
47   * @version $Revision$
48   * @see DeleteAllOperation
49   */
50  public class TruncateTableOperation extends DeleteAllOperation
51  {
52  
53      /**
54       * Logger for this class
55       */
56      private static final Logger logger = LoggerFactory.getLogger(TruncateTableOperation.class);
57  
58      TruncateTableOperation()
59      {
60      }
61  
62      ////////////////////////////////////////////////////////////////////////////
63      // DeleteAllOperation class
64  
65      protected String getDeleteAllCommand()
66      {
67          return "truncate table ";
68      }
69  
70      ////////////////////////////////////////////////////////////////////////////
71      // DatabaseOperation class
72  
73      public void execute(IDatabaseConnection connection, IDataSet dataSet)
74              throws DatabaseUnitException, SQLException
75      {
76          logger.debug("execute(connection={}, dataSet={}) - start", connection, dataSet);
77  
78          // Patch to make it work with MS SQL Server
79          DatabaseConfig config = connection.getConfig();
80          boolean oldValue = config.getFeature(DatabaseConfig.FEATURE_BATCHED_STATEMENTS);
81          try
82          {
83              config.setFeature(DatabaseConfig.FEATURE_BATCHED_STATEMENTS, false);
84              super.execute(connection, dataSet);
85          }
86          finally
87          {
88              config.setFeature(DatabaseConfig.FEATURE_BATCHED_STATEMENTS, oldValue);
89          }
90      }
91  }