Bug 141950 Selection of select value in data set filter is error
Details: Selection of select value in data set filter is error Step: 1.New a report design. 2.Create a sample datasource and dataset. 3.Switch to filter. 4.Select a value in expression. 5.Drop the list of the value1 and select <select value...> Actual result: No value is appear and pop up an error. It said that "An expression has not been set"
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/data/ui/util/DataSetProvider.java
newColumnName = UNNAME_PREFIX
						+ RENAME_SEPARATOR + String.valueOf( index + 1 );
			else
				newColumnName = columnName
						+ RENAME_SEPARATOR + String.valueOf( index + 1 );
			int i = 1;
			while ( orgColumnNameSet.contains( newColumnName )
					|| newColumnNameSet.contains( newColumnName ) )
			{
				newColumnName += String.valueOf( RENAME_SEPARATOR ) + i;
				i++;
			}
		}
		else
		{
			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 )