Bug 145478 Unable "Select Value" in the Join data set's filter
Step to reproduce: 1.new a join data set(please use the attached file) 2.right click the dataset and click the Edit 3.go to the Filter pane and set a filer 4.click the list of Value1 Actual result: A warning pop up and cant select Value.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/data/ui/util/DataSetProvider.java
newColumnName = columnName;
		}
		return newColumnName;
	}
	/**
	 * @param ds
	 * @param columns
	 */
	public void updateModel( DataSetHandle ds, DataSetViewData[] columns )
	{
		
		PropertyHandle handle = ds.getPropertyHandle( DataSetHandle.COLUMN_HINTS_PROP );
		PropertyHandle resultSetColumnHandle = ds.getPropertyHandle( DataSetHandle.RESULT_SET_PROP );
		Iterator iter = handle.iterator( );
		if ( iter != null )
		{
			while ( iter.hasNext( ) )
			{
				ColumnHintHandle hint = (ColumnHintHandle) iter.next( );
				
				for ( int n = 0; n < columns.length; n++ )
				{
					
					
					
					String columnName = columns[n].getName( );
					if ( columnName == null
							|| columnName.trim( ).length( ) == 0 )
					{
						Iterator resultIter = resultSetColumnHandle.iterator( );