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/impl/dimension/Hierarchy.java
int size = saveHierarchyRows( levelDefs,
				keyDataType,
				attributesDataType,
				sortedDimensionSet );
		
		int savedPointer = (int) documentObj.getFilePointer( );
		documentObj.seek( 0 );
		documentObj.writeInt( size );
		documentObj.seek( savedPointer );
		
		closeWriteDocuemntObject( );
		
		openReadDocuemntObject( );
		
	}
	
	/**
	 * 
	 * @throws IOException
	 */
	private void closeWriteDocuemntObject( ) throws IOException
	{
		if ( documentObj != null )
		{
			documentObj.close( );
			documentObj = null;
		}
		if ( offsetDocObj != null )
		{
			offsetDocObj.close( );