//add by Stanley
// if current directory does not have the file we will jump to next file
//whose file number is one more than previous one
if (!bufferManager.checkTreeExistinCurrentDir(btree.getBtreeId(), oldPageNumber.getFileNumber())) {
oldPageNumber.jumpToNextFile();
bufferManager.addVirtualFile(btree.getBtreeId(), oldPageNumber.getFileNumber());
}
p = new PageNumber(oldPageNumber);
p.add(1);