System.arraycopy(bytes, 0, cursorBytes, 0, bytes.length);
cursorKey.setUserBuffer(ulen, true);
cursorData.setPartial(true);
cursor = blocks.cursor(txn, flags);
if (cursor.get(cursorKey, cursorData,
DbConstants.DB_SET_RANGE | flags) != DbConstants.DB_NOTFOUND)
{
cursor.del(0);