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
return resultList;
	}
	
	/**
	 * 
	 * @param percent
	 * @return
	 * @throws IOException
	 */
	public IDiskArray bottomPercent( double percent ) throws IOException
	{
		return bottomN( (int)(keyCount * percent) );
	}
	/**
	 * Check
	 * @param node
	 * @return
	 */
	private boolean checkValid( NonLeafNode node )
	{
		if ( node.maxKeyValue == null
				|| node.minKeyValue == null
				|| CompareUtil.compare( node.maxKeyValue,  node.minKeyValue ) < 0 )
		{
			return false;
		}
		if ( node.numberOfSon > degree ||node.numberOfSon <= 0  )
		{
			return false;
		}