Firebird 5 empty result with decimal value

CREATE TABLE product1 (    
id INT PRIMARY KEY,    
price NUMERIC(20,4) -- Example: 20 digits with 4 decimal places);
);
INSERT INTO product1(id,price) values(1,40001.1234);
INSERT INTO product1(id,price) values(2,40001.1234);
INSERT INTO product1(id,price) values(3,40001.1234);
SELECT sum(price) FROM product1;
SELECT price FROM product1;

    QCoreApplication a(argc, argv);
    // Establishing connection to the Firebird database
    auto dir = QCoreApplication::applicationDirPath();
    QSqlDatabase db = QSqlDatabase::addDatabase("QIBASE");
    db.setHostName("localhost"); // Replace with your Firebird server hostname
    db.setDatabaseName(QStringLiteral("%1/../database.fdb").arg(dir)); 
    db.setUserName("SYSDBA"); // Replace with your username
    db.setPassword("firebird"); // Replace with your password   
 if (!db.open()) {
        qDebug() << "Error: Failed to connect to database:" << db.lastError().text();
        return -1;
    } else {
        qDebug() << "Connected to database!";
    }
    QSqlQuery query("SELECT price FROM product1",db);
    while (query.next()) {
        qDebug() << query.value(0);
    }    // Perform your database operations here    // Closing the database connection
    db.close(); 

CREATE TABLE product2 (    
id INT PRIMARY KEY,    
price NUMERIC(10,4) -- Example: 10 digits with 4 decimal places
);

INSERT INTO product2(id,price) values(1,4001.1234);
INSERT INTO product2(id,price) values(2,4001.1234);
INSERT INTO product2(id,price) values(3,4001.1234);