Qt 5.8 MySQL Input Medium Blob have diffrent size then Output

[jefftee]

When you use the QSqlQuery constructor overload for QSqlQuery::QSqlQuery(const QString &query = QString(), QSqlDatabase db = QSqlDatabase()), the SQL statement is executed. I suspect what you want is something similar to:

QSqlQuery query(db);
query.prepare("UPDATE orders SET termsServiceFileName=?, termsServiceContent=? WHERE orderID=?");
query.addBindValue(fileInfo.fileName());
query.addBindValue(byteArray);
query.addBindValue(editOrderID);
query.exec();

QSqlQuery query(db);
query.prepare("UPDATE orders SET termsServiceFileName=?, termsServiceContent=? WHERE orderID=?");
query.addBindValue(fileInfo.fileName());
query.addBindValue(byteArray);
query.addBindValue(editOrderID);
query.exec();

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Can you give that a try?