QT SQLite not working in Embedded device
I am using QT framework. Basically I am creating application for ARM devices.
Now I've created sample application using SQLite for DB work. Thing is that one is working in my desktop but when I cross compiled it for device and tried to execute it in my device Getting error.
So I logged some error messages. Finally i found that DB file was created successfully but unable to create table in device.
Is i开发者_如何学JAVAt because of out of memory issue?
Code :
QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName("songs.db");
if (!db.open()) {
QMessageBox::critical(0, qApp->tr("Cannot open database"),
qApp->tr("Unable to establish a database connection.\n"
"This example needs SQLite support. Please read "
"the Qt SQL driver documentation for information how "
"to build it.\n\n"
"Click Cancel to exit."), QMessageBox::Cancel);
//return false;
debugLog("#fileListThread::run()-> Unable to establish a database connection.."<<db.lastError(););
}
else
{
debugLog("#fileListThread::run()-> opened songs.db successfully..");
}
QSqlQuery query;
bool queryStatus = query.exec("create table songsList (id int primary key, "
"Song varchar(20), Artist varchar(20),Producer varchar(20))");
if(queryStatus)
{
debugLog("#fileListThread::run()-> created table in songs DB successfully..");
}
else
{
debugLog("#fileListThread::run()-> failed to create table in songs DB.."<<query.lastError(););
}
Okay! One more quick question-> Is it possible to create DB file and executing queries inside in embeedded devices. In my device available free memory is 9MB.
Thanks, Vishnu
I think you should use
CREATE TABLE IF NOT EXISTS songsList
sql statement rather than
create table songsList
Otherwise once the table is created , the second time you try to execute it, you may get an error.
Other than that I don't see a problem but who knows... I hope this helps.
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