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//! [2]
QSqlQuery q;
q.exec("call qtestproc (@outval1, @outval2)");
q.exec("select @outval1, @outval2");
q.next();
qDebug() << q.value(0) << q.value(1); // outputs "42" and "43"
//! [2]


//! [10]
// STORED_PROC uses the return statement or returns multiple result sets
QSqlQuery query;
query.setForwardOnly(true);
query.exec("{call STORED_PROC}");
//! [10]


//! [24]
db.setHostName("MyServer");
db.setDatabaseName("C:\\test.gdb");
//! [24]


//! [25]
// connect to database using the Latin-1 character set
db.setConnectOptions("ISC_DPB_LC_CTYPE=Latin1");
db.open();
//! [25]


//! [26]
QSqlQuery q;
q.exec("execute procedure my_procedure");
q.next();
qDebug() << q.value(0); // outputs the first RETURN/OUT value
//! [26]


//! [31]
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QMYSQL
//! [31]


//! [34]
column.contains(QRegularExpression("pattern"));
//! [34]


//! [36]
QSqlQuery query(db);
query.setForwardOnly(true);
query.exec("SELECT * FROM table");
while (query.next()) {
    // Handle changes in every iteration of the loop
    QVariant v = query.result()->handle();
    if (qstrcmp(v.typeName(), "PGresult*") == 0) {
        PGresult *handle = *static_cast<PGresult **>(v.data());
        if (handle) {
            // Do something...
        }
    }
}
//! [36]


//! [37]
int value;
QSqlQuery query1(db);
query1.setForwardOnly(true);
query1.exec("select * FROM table1");
while (query1.next()) {
    value = query1.value(0).toInt();
    if (value == 1) {
        QSqlQuery query2(db);
        query2.exec("update table2 set col=2");  // WRONG: This will discard all results of
    }                                            // query1, and cause the loop to quit
}
//! [37]


//! [39]
QSqlDatabase db = QSqlDatabase::addDatabase("QODBC3");
QString connectString = QStringLiteral(
    "DRIVER=/path/to/installation/libodbcHDB.so;"
    "SERVERNODE=hostname:port;"
    "UID=USER;"
    "PWD=PASSWORD;"
    "SCROLLABLERESULT=true");
db.setDatabaseName(connectString);
//! [39]