public void setStartPosition(int pos){
        startPosition = pos;
    }
This sets the start position in the ResultSet from where to begin. This is
called by the Reader in the CachedRowSetImpl to set the position on the page
to begin populating from.
@param pos integer indicating the position in the <code>ResultSet</code> to begin
       populating from.
src/main/java/org/replicadb/rowset/sun/rowset/internal/CachedRowSetReader.java