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
updateModelColumn( dataSet, columns[n] );
		}
		updateModel( dataSet, columns );
		htColumns.put( dataSet, columns );
	}
	
	/**
	 * 
	 * @param dataSetDesign
	 * @param rowsToReturn
	 * @return
	 */
	public final QueryDefinition getQueryDefinition(
			IBaseDataSetDesign dataSetDesign, int rowsToReturn )
	{
		if ( dataSetDesign != null )
		{
			QueryDefinition defn = new QueryDefinition( null );
			defn.setDataSetName( dataSetDesign.getName( ) );
			if ( rowsToReturn > 0 )
			{
				defn.setMaxRows( rowsToReturn );
			}
			List parameters = dataSetDesign.getParameters( );
			Iterator iter = parameters.iterator( );
			while ( iter.hasNext( ) )
			{
				ParameterDefinition paramDefn = (ParameterDefinition) iter.next( );
				if ( paramDefn.isInputMode( ) )
				{