#include<iostream>
#include<iomanip>
#include<occi.h>
#include<string>
using namespace std;
using namespace oracle::occi;
int main (void){
string utilizador ="B3_1";
string password ="B3_1";
string bd ="gandalf.dei.isep.ipp.pt:1521/pdborcl";
try{
Environment *env;
Connection *ligacao;
Statement *instrucao;
env = Environment::createEnvironment (Environment::DEFAULT);
ligacao = env->createConnection (utilizador, password, bd);
cout <<"BDdad: a ligar ..."<< endl;
}catch(SQLException erro){
cerr <<"Erro: "<< erro.getMessage () << endl;}
cin.get();
return 0;
}
For this college project I need to connect Visual Studio 2012 to Oracle in order to interact with the database through VS. The problem is, all my workgroup can connect without any errors but in my case it's slightly different. I get a SQL Exeception in the line "env = Environment::createEnvironment (Environment::DEFAULT);". The error code is 1804, and the message it displays is "error while trying to retrieve text for error ORA-01804". I thought it could be the paths but I have the same as my friends and they can connect and I don't. Have this ever happened or is it normal ?
EDIT:
My teacher advised me to change the version of the Visual Studio 2012. I had the Ultimate version and he told to use the Express to see if works. Already did that and the result is the same. I looked all over the internet and couldn't find a straight answer to my problem.
Error code #32104 indicates that an error occurred in the call but the actual error message could not be retrieved. Essentially this means that Environment::createEnvironment failed then tried to acquire message associated with the error. When it couldn't find it the 32104 error was returned instead.
Because of this the exact cause of the error may be difficult to determine. I do suggest that you ensure both ORACLE_HOME and ORACLE_SID are defined in your shell environment.
Related
Using C++/WinRT, Win10, VS2019, SDK 10.0.22621.0, NuGet CppWinRT 2.0.220608.4
I'm trying to get the RequestPreferredConnectionParameters to work. At this point I am wondering if maybe I have the syntax wrong or maybe something else about it that I am not aware of. The MS docs for the function are here and the link to the various parameters are here.
The command line, as I have it, with pubDevice being the BLE device object, is:
BluetoothLEPreferredConnectionParametersRequest rcoConnect = pubDevice.RequestPreferredConnectionParameters(BluetoothLEPreferredConnectionParameters::ThroughputOptimized());
Just to mention, I am able to run
auto statusTest = co_await pubDevice.RequestAccessAsync();
before the RequestPreferredConnectionParameters without problems so, obviously, the device object is good and can be connected to.
What is happening is this. I have a function, OpenDevice(), that opens the device based on the address. If, after getting the device object, I issue the command above while still in the OpenDevice function, the code will not crash but it will immediately jump to the end of the OpenDevice() function bypassing all other lines of code below it and there will be no connection at all after that.
If I run the RequestPreferredConnectionParameters outside of the OpenDevice() function it errors out with a
An unhandled exception was encountered during a user callback and the line referenced is in base.h line 4942 if (result == impl::error_changed_state)
I had assumed that the callback refered to was the Rx Characteristic ValueChanged Callback that is set in OpenDevice(). So I tested by first revoking that callback with
pubRxCharacteristic.ValueChanged(etValueChangeToken);
and then running the RequestPreferredConnectionParameters but I still got the An unhandled exception error.
The only other callback that I have is the BluetoothLEAdvertisementWatcher advert received callback but that was stopped after the device was found.
Can anyone verify that my syntax seems correct and/or have any clue as to what is causing my problems?
EDIT to show more code in a console app------------
#IInspectable
Again for the record:
Using C++/WinRT, Win10, VS2019 - Console App, SDK 10.0.22621.0, NuGet CppWinRT 2.0.220608.4
Pertinent includes in the pch.h file:
// 2022/9/10 -- for WHCAR and apparently GUID
#include <Windows.h>
#include <tchar.h>
#include <winrt\Windows.Foundation.h>
#include <winrt\Windows.Storage.Streams.h>
#include <winrt\Windows.Devices.Bluetooth.h>
#include <winrt\Windows.Devices.Bluetooth.Advertisement.h>
#include <winrt\Windows.Devices.Bluetooth.GenericAttributeProfile.h>
// 2022/9/10
#include <winrt\Windows.Devices.Enumeration.h>
#include <winrt/Windows.Foundation.Collections.h>
Pertinent name spaces at top of Main.cpp:
using namespace winrt;
using namespace Windows::Foundation;
using namespace winrt::Windows::Foundation;
using namespace Windows::Storage::Streams;
using namespace Windows::Devices::Bluetooth;
using namespace Windows::Foundation::Collections;
using namespace Windows::Devices::Bluetooth::Advertisement;
using namespace Windows::Devices::Bluetooth::GenericAttributeProfile;
// 2022/9/10 for RequestConnectionAsync
using namespace Windows::Devices::Enumeration;
I assume that the code to watch for and find the device is not pertinent here. Needless to say the device is found and the address is passed to OpenDevice to create the device object.
Here is the top portion of OpenDevice:
IAsyncAction OpenDevice(unsigned long long deviceAddress)
{
auto device = co_await BluetoothLEDevice::FromBluetoothAddressAsync(deviceAddress);
// 2022/9/10 test code
auto statusTest = co_await device.RequestAccessAsync();
// Allowed, DeniedBySystem, Unspecified
if (statusTest != DeviceAccessStatus::Allowed) {
std::cout << "Access to device is not allowed...." << std::endl;
}
else {
std::cout << "Access to device is allowed...." << std::endl;
}
// Next line ends without error but immediately goes to the end of OpenDevice()
std::cout << "Asking for ThroughputOptimized...." << std::endl;
auto statusConnection = device.RequestPreferredConnectionParameters(BluetoothLEPreferredConnectionParameters::ThroughputOptimized());
std::cout << "Line after Request ThroughputOptimized...." << std::endl;
Beep(500, 500);<br/> // function never gets to this cout or Beep<br/>
// More code follows to get Rx and TxCharacteristics etc.<br/>
} // end OpenDevice
Here is the console output:
Notice the last cout is the line Asking for ThroughputOptimized.
No cout for Line after Request ThroughputOptimized and no Beep.
Trying to locate the TENS device: Waiting for device:
AdvertisementReceived:
LocalName: []
AdvertisementType: [ConnectableUndirected]
BluetoothAddress: [0x300000e59630]
RawSignalStrengthInDBm: [-60] ServiceUUID: [0000fff0-0000-1000-8000-00805f9b34fb] Found TENS Device Main
Service.... TENS device found. Access to device is
allowed.... Asking for ThroughputOptimized....
WinRTBle.exe (process 15576) exited with code -1073740791. Press
any key to close this window .
Barring a problem in syntax or a missing header. the only other thing that I can think of is that it needs Win11. The docs for RequestPreferredConnectionParameters Method say
Windows requirements Device family Windows 11 (introduced in
10.0.22000.0)
Does that mean that regardless of the SDK it needs Win11?
#IInspectable As much as I was dreading this, apparently the answer is that it needs Win11. The console app code mentioned above in the edit to the original question was compiled into an exe. I have Win11 on a VM VirtualBox and I ran that exe on that Win11 and the code continued past the ThroughputOptimized() line in question and finished the rest of the app as expected. So that's ashamed. I don't have Win11 on a real box yet (call me paranoid) but I guess I could bracket the code for the Win11 OS and only run it when a user happens to be running Win11
Always something.......
EDIT 2 ...............................
And the "Always something" comes up immediately. As far as I can tell from what I have been able to find, there is no way to tell if the OS is Win10 or Win11. It was recommended to use RtlGetVersion but that returned 10 for both Win10 and Win11. Another poster suggested to use the File version of the System32 kernal32.dll file but they also both reported major number 10 and minor number 0. The MS docs for adding a version manifest had the UUIDs for both OSs as the same.
This is ridiculous that MS would come up with a function that only runs in Win11 and then not have to ability to tell you which OS you are running in....Jeeeeeeze.....
EDIT 3.........................
Spoke too soon. I was messing around with the console app and forgot that in my MFC app I use the WMI IWbemClassObject Caption property to get the OS.
For Windows 10 I get
Microsoft Windows 10 Pro
and for Win11 I get
Microsoft Windows 11 Home
So apparently that is really the only way to do it.
My aunt gave me a book about c++ (for beginners). It's nice and so I wanted to test one of those code samples. But I am just getting errors. I didn't find anything that could help me on Google or so.
I am using Eclipse Mars.1 C++ and MinGW.
Code:
/*
* Erstes_Programm.cpp
*
* Created on: 26.12.2015
* Author: Luca
*/
// Erstes Programm
#include <iostream>
using namespace std;
int main() {
cout << "It's just a test!" << endl;
return 0;
}
I am getting those errors:
Using namespace:
Description Resource Path Location Type
expected ';' before ':' token
Erstes_Programm.cpp /Programmieren C++ (Einführung)
line 10
C/C++ Problem
AND
Description Resource Path Location Type
expected unqualified-id before ':' token
Erstes_Programm.cpp /Programmieren C++ (Einführung)
line 10
C/C++ Problem
Hope somebody can help me?
Here is a screenshot:
EDIT: PROBLEM SOLVED!! I don't know WHAT I did, but it's solved I'm not getting any errors and everything works perfectly. Thanks for everybody who wanted to help
The first line in the screenshot doesn't make any sense. Remove it. The rest looks fine. And in the future, post text, not screenshots.
Instead work on X-code rather then eclipse for C++. Visual studio is most recommend.
For Your problem, I think you got to play with the library, something must not be supported, other then that your code look fine.
I am using following simple code to connect to database and I am getting error as ORA-24399 which says invalid number of connections specified. I have googled enough but not clue. This is a CPP program.
Following is code Snippet:
try
{
Environment *env = Environment::createEnvironment(Environment::DEFAULT);
Connection *con= env->createConnection("test","test","testdb");
}
catch(SQLException ex)
{
cout<<ex.getMessage().c_str();
}
P.S Using SQL Plus I am able to connect to the database where this code is being run. There are no issues there. Only through program there is a failure seen.
P.P.S Tried using connectionpool as well but still no luck...
Looking at your error, it seems that the problem is somewhere else in your code: you should fix the parameters (related to connection numbers) in the call to OCIConnectionPoolCreate.
I am helping a friend with his bachelor thesis project. It is a program that calculates bending moments for various materials. One of the extra requirements that the client desires is database functionality to store and retrieve various pieces of data being used in the program.
The program is a forms application written in managed C++. I jumped on board to help with writing the database functionality. I am using MySQL Server 5.5 and the MySQL Connector/C++ to bridge the program and the database. Everything has been going pretty well and all the functionality we need works just fine, but only in debug. As soon as we put the program into release mode there is undefined behavior occurring at runtime. Below is the function that is used to open a connection to the database:
try
{
m_driver = get_driver_instance();
m_conn = m_driver->connect(m_dbHost, m_dbUser, m_dbPwd);
m_conn->setSchema(m_dbSchema);
}
catch(sql::SQLException &e)
{
int a = e.getErrorCode();
MessageBoxA(NULL, e.what(), "DB Error", MB_OK);
}
The values passed into the connect function are all std::string. In debug mode the connection is made with no issues. In release mode an exception is caught after the connect function is called, and displays the message "Unknown MySQL Server Host '####' (0)" where the #### is always some garbage text. I also notice that in the output window another exception is being thrown, this one is the type System.Runtime.InteropServices.SEHException.
I have been doing some research and have seen numerous cases of this exception on many forums (and here on stack exchange) but no one seems to be having this issue with the MySQL connector. My assumption is that the memory is being corrupted because the program is mixed mode, with the main program code being written in Managed C++ and my database helper code being in native C++ (as required by the connector).
Is there something I can change in my code to try and fix this issue to that the strings aren't being corrupted at run time. I have tried many different hacks to try and solve the problem but nothing has worked.
Thanks,
Tom
Update: I am now seeing this error in debug mode. I added code to retrieve values from the database and populate some text boxes on the form. The code is as follows:
// Populate the form with material details
String^ selectedMaterial = (String^)(comboBox1->SelectedItem);
string selectedMaterial_ = "";
MarshalString(selectedMaterial, selectedMaterial_);
sql::ResultSet* results = dbHelper.GetData("matname", selectedMaterial_);
if (results->rowsCount() == 1)
{
// Outdim
string outdim_ = "";
outdim_ = results->getString("outdim");
String^ outdim = gcnew String(outdim_.c_str());
textBox1->Text = outdim;
}
else
{
// !!!! Duplicate materials in list
}
When it tries to read outdim from the result set the SEHException is thrown, and the only other piece of information given is that it was thrown in an external component.
Update 2: I ran Application Verifier against the debug executable and then launched the program from VS2010. However the form window never loads so somewhere along the line the program must be getting halted. Strangely there is absolutely no information in the log files in Application Verifier. I also tried with the release version and I didnt get any useful information from that either.
I want to connect to sql using c++.
I have g++ (sparc-sun-solaris2.10-g++) installed on my UNIX machine and the sql version is SQL*Plus: Release 10.2.0.4.0.
I want to write a c++ code by which I want to connect to sql.
Using shell script I can easily connect to the DB but using c++ I don't know how to do it.
Thanks .
I have this piece of code but this is failing while I compile :
error :
Creating library libr9.so 20110308_083331
ld: fatal: file /tlmsr1/tlm/rt/kimi/proj/c9rprOG/crp/templates.a: open failed: No such file or directory
ld: fatal: file /tlmsr1/tlm/rt/kimi/proj/c9rprOG/crp/templates.a: open failed: No such file or directory
ld: fatal: File processing errors. No output written to /tlmsr1/tlm/rt/kimi/proj/c9rprOG/lib/libcrpr9.so
gmake: * [libr9.so] Error 1
code :
#include <stdlib.h>
#include <occi.h>
#include <iostream>
using namespace oracle::occi;
using namespace std;
class testOcci
{
private:
Environment *env;
Connection *conn;
public:
testOcci (string user, string passwd, string db)
{
env = Environment::createEnvironment (Environment::DEFAULT);
conn = env->createConnection (user, passwd, db);
}
/**
* Destructor for the occi test case.
*/
~testOcci ()
{
env->terminateConnection (conn);
Environment::terminateEnvironment (env);
} // end of ~testOcci ()
};
int main(void)
{
string user="sbsdb6";
string passwd="sbsdb6";
string db="ABPDV";
testOcci *demo = new testOcci (user, passwd, db);
cout << "Creation Successful" << endl;
delete (demo);
cout << "Deletion Successful" << endl;
return 0;
}
Since it seems as though you mean Oracle when you say sql I think you want to try OCCI . In that case this link might help.
But... using OCCI is quite different from connecting to Oracle with a shell script via SQL*Plus.
You might also take a look at those two libs.
OTL and SOCI.
I used both in some projects and they worked fine for me.
You need to use ODBC libraries to connect and retrieve data from a RDBMS. This seems to be a good starting point.
Try the class named CDatabase.
Create a connection to the databse.
And a function named ExecuteSQL() using which u can execute queries.
For fetching the results u have CResultSet class.
If you find difficulty post here.. i wil send u the sample.
thanks
Arun P.