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
if ( node.offset < 0 )
		{
			return false;
		}
		return true;
	}
	
	/**
	 * 
	 * @param nodeSelection
	 * @param selections
	 * @param resultList
	 * @throws IOException
	 */
	private void processNonLeafNode( NodeSelection nodeSelection,
			ISelection[] selections, IDiskArray resultList ) throws IOException
	{
		NonLeafNode tempNode = null;
		NodeSelection tempNodeSelection = null;
		boolean find = false;
		documentObject.seek( nodeSelection.node.offset );
		for ( int i = 0; i < nodeSelection.node.numberOfSon; i++ )
		{
			tempNode = readNonLeafNode( );
			tempNodeSelection = new NodeSelection( tempNode, selections.length );
			find = false;
			for ( int j = 0; j < nodeSelection.selectionMark.length; j++ )
			{
				if ( nodeSelection.selectionMark[j] )
					if ( match( tempNode, selections[j] ) )