public Cursor findFirstOrLast(Session session, boolean first) throws SQLException {
Cursor cursor;
if (first) {
cursor = mainIndex.find(session, Long.MIN_VALUE, Long.MAX_VALUE, false);
} else {
long x = mainIndex.getLastKey();
cursor = mainIndex.find(session, x, x, false);
}
cursor.next();
return cursor;
}
public Cursor find(Session session, SearchRow first, SearchRow last) throws SQLException {
long min = mainIndex.getLong(first, Long.MIN_VALUE);
long max = mainIndex.getLong(last, Long.MAX_VALUE);
return mainIndex.find(session, min, max, false);
}