Help please : dbsequence refresh on MS sql server

Question

This is a month that I work on this problem and no result
I want to set up a field as DBSequence with a database SQL Server, and then refreshes its value after an insert and can then edit the corresponding record on the same form ...
I tried to use a Impl class and method do_dml () but this one works only for MySQL and not for SQL Server , this is the code of the method do_DML ():
*protected void doDML(int i, TransactionEvent e) {*
super.doDML(i, e);
String currentViewName = getEntityDef().getName();
*if ( i == DML_INSERT) {*
PreparedStatement stmt = this.getDBTransaction().createPreparedStatement("SELECT last_insert_id()",1);
*try {*
stmt.execute();
ResultSet rs = stmt.getResultSet();
*if ( rs != null ){*
rs.first();
setAttribute("id",rs.getBigDecimal(1));
*} catch (SQLException ex) {*
ex.printStackTrace();
it also works on Oracle, simply activate the option "refrech after insert".
someone told me the following link, but I could not make it work:
http://www.oracle.com/technetwork/developer-tools/jdev/multidatabaseapp-085183.html
Now I would really like you to help me because my project is stuck because of this problem.
I would be very grateful

Answer 1

hello,
by searching in Help, I have found it possible to generate a field DBSequence and refreshes without using a database trigger, here's what I found:
*4.12.5 Assigning the Primary Key Value Using an Oracle Sequence*
As an alternative to using a trigger-assigned value (as described in Section 4.10.10, "How to Get Trigger-Assigned Primary Key Values from a Database Sequence"), you can assign the value to a primary key when creating a new row using an Oracle sequence. This metadata-driven approach allows you to centralize the code to retrieve the primary key into a single Java file that can be reused by multiple entity objects.
Example 4-17 shows a simple CustomEntityImpl framework extension class on which the entity objects are based. Its overridden create() method tests for the presence of a custom attribute-level metadata property named SequenceName and if detected, populates the attribute's default value from the next number in that sequence.
Example 4-17 CustomEntityImpl Framework Extension Class
package sample;
import oracle.jbo.AttributeDef;
import oracle.jbo.AttributeList;
import oracle.jbo.server.EntityImpl;
import oracle.jbo.server.SequenceImpl;
*public class CustomEntityImpl extends EntityImpl {*
*protected void create(AttributeList attributeList) {*
super.create(attributeList);
*for (AttributeDef def : getEntityDef().getAttributeDefs()) {*
String sequenceName = (String)def.getProperty("SequenceName");
*if (sequenceName != null) {*
SequenceImpl s = new SequenceImpl(sequenceName,getDBTransaction());
setAttribute(def.getIndex(),s.getSequenceNumber());
To assign the primary key value using an Oracle sequence:
Create the CustomEntityImpl.java file in your project, and insert the code shown in Example 4-17.
In the Application Navigator, double-click the entity you want to edit.
In the overview editor, click the Attributes navigation tab, and double-click the attribute you want to edit.
In the Edit Attribute dialog, set the attribute Type to Number, and then click the Custom Properties node.
Enter SequenceName for the name.
Enter the name of the database sequence for the value, click Add, and then click OK to create the custom property.
For example, a Dept entity could define the custom property SequenceName on its Deptno attribute with the value DEPT_TABLE_SEQ.
Now I do not know what I need to replace DEPT_TABLE_SEQ