Bug 122173 Can't drag and drop a data set column to report design layout editor
With 20051227's build, I can't bind a data set column to a table cell by drag & drop it from data explorer. This is a show stopper that we need to have it fixed.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
/**
	 * Validates target column can paste another column.
	 * 
	 * @param targetObj
	 *            target table/grid column
	 * @param transferData
	 *            copy data of table/grid column
	 * @param isNew
	 *            true: insert and paste; false: override and paste
	 * @return can paste
	 */
	public static boolean handleValidateContainColumnPaste(
			ColumnHandle targetObj, ColumnBandData transferData, boolean isNew )
	{
		int columnNumber = HandleAdapterFactory.getInstance( )
				.getColumnHandleAdapter( targetObj ).getColumnNumber( );
		Object parent = targetObj.getContainer( );
		if ( parent instanceof TableHandle )
		{
			if ( isNew )
			{
				return ( (TableHandle) parent ).canInsertAndPasteColumn(
						transferData, columnNumber );
			}
			return ( (TableHandle) parent ).canPasteColumn( transferData,
					columnNumber, true );
		}
		else if ( parent instanceof GridHandle )
		{
			if ( isNew )