postgresql backup and restore

  • I have some problem trying to restore a backup made with pg_dump (it´s a postgres command).
    When I restore the backup using the postgresql command from console works fine:
    psql "dbname=myDB host=localhost user=myUsr password=Mypwd" < myBackup

    So I tried to implement the same function in QT via QProcess without success.
    MyProcess.setNativeArguments(""dbname=myDB host=localhost user=myUsr password=Mypwd" < myBackup")

    Somebody has some example how to do it correctly.

    Many thanks

  • Hi all,

    Well I found the solution searching in Internet and I found this link:

    Looks that psql for some reason cannot be launch inside of Qt, so I created a bat file that contains the psql command and their parameters. Then I call that bat file from QProcess and Finally works fine!!!

    Anyway I will keep open this ticket for a while if somebody has a better solution.


  • Moderators

    @PabloArg Processes started using QProcess do NOT run inside your Qt app!
    The problem is that you pass the parameter wrongly: you should not pass all parameters as one string.
    You should read QProcess documentation, there are examples:

    QObject *parent;
    QString program = "./path/to/Qt/examples/widgets/analogclock";
    QStringList arguments;
    arguments << "-style" << "fusion";
    QProcess *myProcess = new QProcess(parent);
    myProcess->start(program, arguments);

    So, each parameter is put as string in a string list.

    You should connect to a slot and print the error.

  • Hi jsulm,

    I tried as you said as well, but doesn´t work. Anyway according to QProcess is possible to use Native parameters where your parameters you can put as string and QT will recognize each parameters by spaces between them. I am usign for long time without problem.

    I will close this ticket because looks that this is a problem with psql. And the only solution is create a bat file, and run the bat in QProcess.

    Many thanks to everybody as I said before if you guys found better idea to do this let me know

Log in to reply

Looks like your connection to Qt Forum was lost, please wait while we try to reconnect.