Bug 182895 Support sort on Level attribute.
Currently in OLAP engine we only support sort on level key value. We should go ahead to support sort on level attribute value.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/query/view/QueryExecutor.java
}	
		}
		else
		{
			
			id = executor.getCubeQueryDefinition( ).getQueryResultsID( );
			rs = AggregationResultSetSaveUtil.load( id,
					new FileArchiveReader( executor.getContext( )
							.getTmpdir( ) + "Cache" ), VersionManager.getLatestVersion( ) );
		}
		
		executor.setQueryResultsId( id );
		
		return rs;
	}
	/**
	 * 
	 * @param cubeQueryDefinition
	 * @param cubeQueryExcutorHelper
	 * @throws DataException
	 */
	private void populateAggregationSort( CubeQueryExecutor executor,
			CubeQueryExecutorHelper cubeQueryExcutorHelper, boolean isRow )
			throws DataException
	{
		List columnSort = isRow ? executor.getRowEdgeSort( )
				: executor.getColumnEdgeSort( );
		for ( int i = 0; i < columnSort.size( ); i++ )
		{