Bug 350763 User-defined Sort Hints in a data set got overwritten in a SQB design session
When editing a data set in the Data Set Editor, an user may add own user-defined Sort Hints. But each time an user activates the SQB designer page in DSE, those sort hints always got overwritten and replaced by the sort keys defined in the query's OrderBy clause. This is expected behavior if the OrderBy clause gets changed, as it is not clear how a revised OrderBy clause relates to those user-defined sort hints. However, if the OrderBy clause did not get changed, the previously defined sort hints should be preserved.
data/org.eclipse.birt.report.data.oda.jdbc.dbprofile.ui/src/org/eclipse/birt/report/data/oda/jdbc/dbprofile/ui/internal/sqb/SQBDataSetWizardPage.java
return pageContainer;
	}
	/**
	 * Attempts to connect based on the specified ISQLBuilderEditorInput's connection info.
	 * If connection fails, raise an error message dialog with the connection failure messages.
	 * @return true if connect succeeds; false otherwise
	 */
    private boolean connect( Shell parentShell, ISQLBuilderEditorInput sqbInput )
    {
        IConnectionProfile connProfile = sqbInput.getConnectionInfo().getConnectionProfile();
		if( connProfile.supportsWorkOfflineMode() && connProfile.canWorkOffline() )
		    return true;
		if( connProfile.getConnectionState() == IConnectionProfile.CONNECTED_STATE )
		    return true;      
		assert( connProfile.equals( getConnectionProfile( false, false ) ) );
		return runConnect( parentShell ); 		
    }
    /**
     * Connect to database in a runnable with progress bar dialog.
     * @param connProfile
     * @param parentShell
     */
    private boolean runConnect( final Shell parentShell )
	{
		IRunnableWithProgress runnable = new IRunnableWithProgress( ) 
		{
			public void run( IProgressMonitor monitor )
					throws InvocationTargetException, InterruptedException
			{
				monitor.beginTask( Messages.sqbWizPage_connectingDB, IProgressMonitor.UNKNOWN );