DB2MainframePlatform


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4    * (the "License").  You may not use this file except 
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7    * You can obtain a copy of the license at 
8    * glassfish/bootstrap/legal/CDDLv1.0.txt or 
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10   * See the License for the specific language governing 
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12   * 
13   * When distributing Covered Code, include this CDDL 
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15   * glassfish/bootstrap/legal/CDDLv1.0.txt.  If applicable, 
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21  // Copyright (c) 1998, 2006, Oracle. All rights reserved.  
22  package oracle.toplink.essentials.platform.database;
23  
24  import java.io.StringWriter  ;
25  
26  import oracle.toplink.essentials.expressions.ExpressionOperator;
27  import oracle.toplink.essentials.queryframework.ValueReadQuery;
28  
29  /**
30   * <B>Purpose</B>: Provides DB2 Mainframe specific behaviour.<P>
31   * <B>Responsibilities</B>:
32   * <UL>
33   *      <LI>Specialized CONCAT syntax
34   * </UL>
35   */
36  public class DB2MainframePlatform extends DB2Platform {
37  
38      /**
39       * INTERNAL:
40       * Initialize any platform-specific operators
41       */
42      protected void initializePlatformOperators() {
43          super.initializePlatformOperators();
44  
45          addOperator(ExpressionOperator.simpleLogicalNoParens(ExpressionOperator.Concat, "CONCAT"));
46      }
47  
48      /**
49       * INTERNAL:
50       * Build the identity query for native sequencing.
51       */
52      public ValueReadQuery buildSelectQueryForNativeSequence() {
53          ValueReadQuery selectQuery = new ValueReadQuery();
54          StringWriter   writer = new StringWriter  ();
55          writer.write("SELECT IDENTITY_VAL_LOCAL() FROM SYSIBM.SYSDUMMY1");
56  
57          selectQuery.setSQLString(writer.toString());
58          return selectQuery;
59      }
60  }
61
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