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 void writeKeyObject( IndexKey keyObject ) throws IOException
	{
		documentObject.writeInt( keyObject.dimensionPos );
		for ( int i = 0; i < keyDataType.length; i++ )
		{
			DocumentObjectUtil.writeValue( documentObject,
					keyDataType[i],
					keyObject.key[i] );
		}
		documentObject.writeInt( keyObject.offset );
	}
	/**
	 * 
	 * @return
	 * @throws IOException
	 */
	private NonLeafNode readNonLeafNode( ) throws IOException
	{
		NonLeafNode node = new NonLeafNode( );
		node.numberOfSon = documentObject.readByte( );
		node.minKeyValue = DocumentObjectUtil.readValue( documentObject, keyDataType );
		node.maxKeyValue = DocumentObjectUtil.readValue( documentObject, keyDataType );
		node.offset = documentObject.readInt( );
		return node;
	}
	/**
	 * 
	 * @return
	 * @throws IOException
	 */