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
{
	
	private String name;
	private int degree;
	private IDocumentObject documentObject = null;
	private IDocumentObject offsetDocumentObject = null;
	private IDocumentManager documentManager = null;
	private int[] keyDataType;
	private int keyCount;
	private int rootNodeOffset;
	private int numberOfLevel;
	/**
	 * 
	 * @param name
	 * @param sortedStack
	 * @return
	 * @throws IOException
	 * @throws DataException 
	 */
	public static DiskIndex createIndex( IDocumentManager documentManager,
			String name, int sonNumber, IDiskArray keyList, boolean isSorted )
			throws IOException, DataException
	{
		assert sonNumber <= 127;
		assert keyList.size( ) > 0;
		DiskIndex indexTree = new DiskIndex( documentManager,
				name,
				sonNumber,
				keyList,