Syntaxe error source with QSqlQuery - c++

Question

I have a problem with a QSqlQuery when I execute a source command on my database.
This code works :
QString myRequest = "CREATE DATABASE MY_DATABASE;";
lQueryResult.Exec(myRequest);
if(!lQueryResult.GetMexec())
{
qDebug() << "Error in the request";
return false;
}
else
{
qDebug() << "The request is OK";
}
This code doesn't works, I have a syntax error :
You have an error in
your SQL syntax; check the manual that corresponds to your MariaDB
server version for the right syntax to use near 'source
./folder/myFile.sql' at line 1 QMYSQL: Unable to execute query
This is the code :
myRequest = "source myFile.sql";
lQueryResult.Exec(myRequest);
if(!lQueryResult.GetMexec())
{
qDebug() << "Error";
qDebug() << lQueryResult.LastError();
return false;
}
else
{
qDebug() << "OK";
}
I can successfully do my source with this command :
QString lCommand("mysql -uUsername -pPassword Data_Base -e \"source " + variablePath + variableFile + ".sql\"");
system(lCommandeProvisoire.toStdString().c_str());
I have no error. But, if I execute this code juste after, I have the error
No database selected QMYSQL: Unable to execute query
:
TheRequest = "SELECT * FROM MyTable;";
QueryResult.Exec(TheRequest);
if(!QueryResult.GetMexec())
{
qDebug() << QueryResult.LastError();
return false;
}
else
{
qDebug() << "OK";
}
But, If I execute a select * from MyTable in shell, it works.
Also, if I execute this in a shell logged in mysql, it works :
source myFile.sql

Answer 1

SOURCE is MySQL client command which means it is executed by MySQL shell, not by MySQL server, so you can't execute it via QSqlQuery. You can work around this by reading whole file and then sending it's contents to server.