Bug 182296 Crosstab - non-numeric measures
Feature request. Looking at the 2.2.M6 release, it seems that measures (the fields that can be in the matrix part of the output) need to be numeric. I looked at the spec documents and it seems there is no requirement for non-numeric measures
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/data/util/DiskIndex.java
}
	}
	/**
	 * 
	 * @param keyList
	 * @return
	 * @throws IOException
	 */
	private IDiskArray sortKeys( IDiskArray keyList ) throws IOException
	{
		DiskSortedStack sortStack = new DiskSortedStack( Constants.LIST_BUFFER_SIZE,
				false,
				IndexKey.getKeyComparator( ),
				IndexKey.getCreator( ) );
		for ( int i = 0; i < keyList.size( ); i++ )
		{
			sortStack.push( (IComparableStructure) ( keyList.get( i ) ) );
		}
		BufferedStructureArray reList = new BufferedStructureArray( IndexKey.getCreator( ),
				Constants.LIST_BUFFER_SIZE );
		for ( int i = 0; i < keyList.size( ); i++ )
		{
			reList.add( sortStack.pop( ) );
		}
		return reList;
	}
	/**
	 * 
	 * @param value