Bug 140751 using a grid in a table does not update row value
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dnd/InsertInLayoutUtil.java
DataItemHandle dataHandle = DesignElementFactory.getInstance( )
				.newDataItem( null );
		ComputedColumn bindingColumn = StructureFactory.newComputedColumn( dataHandle,
				model.getName( ) );
		bindingColumn.setExpression( DEUtil.getExpression( model ) );
		dataHandle.addColumnBinding( bindingColumn, false );
		dataHandle.setResultSetColumn( bindingColumn.getColumnName( ) );
		return dataHandle;
	}
	/**
	 * Inserts dataset column into the target. Add label or group key if
	 * possible
	 * 
	 * @param model
	 *            column item
	 * @param target
	 *            insert target like cell or ListBandProxy
	 * @param targetParent
	 *            target container like table or list
	 * @return to be inserted data item
	 * @throws SemanticException
	 */
	protected static DataItemHandle performInsertDataSetColumn(
			ResultSetColumnHandle model, Object target, Object targetParent )
			throws SemanticException
	{
		/*
		 * search the target container, if container has the same dataset, add
		 * the column binding if it does not exist in the container. If the
		 * container's dataset is not the dragged dataset column's dataset,