Method isEmpty

Src/Database/DatabaseFilter.cpp:94–106

}

bool CDatabaseFilter::isEmpty()
{
    QSqlQuery query(GetDatabase());
    query.prepare("SELECT `key` FROM " + m_szTableName);
    bool bRet = query.exec();
    if(!bRet) {
        qCritical(log) << "Failed to isEmpty:"
                       << query.lastError().text()
                       << "Sql:" << query.executedQuery();
        return true;
    }
    return !query.next();
}

int CDatabaseFilter::OnProcess(std::function<int (const QString &)> cb, bool bErrExit)
{