private Map<String, ByteBuffer> previousRowKey = new HashMap<String, ByteBuffer>(); // previous CF row key
public RowIterator()
{
AbstractType type = partitioner.getTokenValidator();
ResultSet rs = session.execute(cqlQuery, type.compose(type.fromString(split.getStartToken())), type.compose(type.fromString(split.getEndToken())) );
for (ColumnMetadata meta : cluster.getMetadata().getKeyspace(quote(keyspace)).getTable(quote(cfName)).getPartitionKey())
partitionBoundColumns.put(meta.getName(), Boolean.TRUE);
rows = rs.iterator();
}