数据库对内存的存储与读取

#include "mainwindow.h"
#include <QApplication>
#include <QtSql/QSqlDatabase>
#include <QtDebug>
#include <QtSql/qsqlquery.h>
#include <QByteArray>
#include <QTextCodec>
#include <QSqlError>
#define MAX_BUFFER_SIZE (200)
typedef unsigned char UCHAR8;
typedef UCHAR8 Message[MAX_BUFFER_SIZE];
typedef struct _Buffer
{
Message message;
int length;
}Buffer;

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
QSqlDatabase db = QSqlDatabase::addDatabase("QOCI");
db.setHostName("localhost");
db.setUserName("SYSTEM");
db.setPassword("FuxinOracle2014");
db.setPort(1523);
db.setDatabaseName("orcl");
if(db.open())
qDebug() << "open";
QSqlQuery q(db);
_Buffer buf;
memset(&buf, 0, sizeof(_Buffer));
buf.length = 1400;
for(int i = 0; i < 10; i++)
buf.message[i] = i + 'a';
for(int i = 10; i < 20; i++)
buf.message[i] = '\0';
for(int i = 20; i < 30; i++)
buf.message[i] = i + 'a';
for(int i = 30; i < 40; i++)
buf.message[i] = ',';
for(int i = 40; i < 50; i++)
buf.message[i] = 'a' - i;
QByteArray by((char*)buf.message, 1400);
if(q.prepare("insert into ssss values(?)"))
{
q.bindValue(0,by);
if(q.exec())
qDebug() << "sus";
else
qDebug() << q.lastError();
}
q.exec("select * from ssss");
while(q.next())
{

QByteArray by2 = q.value(0).toByteArray();
;
}
return a.exec();
}