带有 C++ 的 OCCI 错误：TNS:net 服务名称指定错误

Question

I have created a simple C++ programm to connect the Oracle OCCI with a OracleDB instance.

Here is the Code:

#include <iostream>
#include <string>
#include <occi.h>

//  Connection information
const std::string userName = "admin";
const std::string password = "password";

const std::string connectString = "(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.8.190)(PORT = 1521)))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = ORCLCDB)))";                    

//  Connection enviroment
oracle::occi::Environment *env = oracle::occi::Environment::createEnvironment();


int main() {

int succes;

oracle::occi::Connection *conn = env->createConnection(userName, password, connectString);
succes = 0;

std::string id;
std::cin >> id;

std::string anw = "SELECT * FROM BESTAND WHERE ID=";

std::string cnw = anw + id;

oracle::occi::Statement *stmt = conn -> createStatement(cnw);

oracle::occi::ResultSet *rs = stmt -> executeQuery();

while (rs -> next()) {

std::string b = rs -> getString(2);

std::cout << b << std::endl;

}



stmt -> closeResultSet(rs);
conn -> terminateStatement(stmt);
env -> terminateConnection(conn);

oracle::occi::Environment::terminateEnvironment(env);

}

I use g++ on CentOS-8 to complie the programm, and the programm compilies without a problem but when i execute the Programm i get this error:

terminate called after throwing an instance of 'oracle::occi::SQLException'
what():  ORA-12162: TNS:net service name is incorrectly specified

Have anybody here an idea how i can fix this problem.

Answer 1

Is "ORCLCDB" the SERVICE_NAME, or the ORACLE_SID? Service names are usually fully qualified with a domain. You can try this (spaces are fine):

(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.8.190)(PORT = 1521))(CONNECT_DATA = (SERVER = DEDICATED)(SID = ORCLCDB)))

Or double-check the service name from the TNS Listener status to make sure you've got the right value. The "lsnrctl status" command on the database server should return a list of active services; use one with a status of "READY".