Exemplos de DBC::c_getf_set_range_reverse em C++ (Cpp)

Exemplo n.º 1

Arquivo: indexcursor.cpp Projeto: igagnidz/tokumx

    void IndexCursor::setPosition(const BSONObj &key, const BSONObj &pk) {
        TOKULOG(3) << toString() << ": setPosition(): getf " << key << ", pk " << pk << ", direction " << _direction << endl;

        // Empty row buffer, reset fetch iteration, go get more rows.
        _buffer.empty();
        _getf_iteration = 0;

        storage::Key sKey( key, !pk.isEmpty() ? &pk : NULL );
        DBT key_dbt = sKey.dbt();;

        int r;
        const int rows_to_fetch = getf_fetch_count();
        struct cursor_getf_extra extra(&_buffer, rows_to_fetch);
        DBC *cursor = _cursor.dbc();
        if ( forward() ) {
            r = cursor->c_getf_set_range(cursor, getf_flags(), &key_dbt, cursor_getf, &extra);
        } else {
            r = cursor->c_getf_set_range_reverse(cursor, getf_flags(), &key_dbt, cursor_getf, &extra);
        }
        if ( extra.ex != NULL ) {
            throw *extra.ex;
        }
        if (r == TOKUDB_INTERRUPTED) {
            _interrupt_extra.throwException();
        }
        if ( r != 0 && r != DB_NOTFOUND ) {
            extra.throwException();
            storage::handle_ydb_error(r);
        }

        _getf_iteration++;
        _ok = extra.rows_fetched > 0 ? true : false;
        if ( ok() ) {
            getCurrentFromBuffer();
        }

        TOKULOG(3) << "setPosition hit K, PK, Obj " << _currKey << _currPK << _currObj << endl;
    }