Connecting the Raspberry Pi 2 with an External Remote Database - c++

Question

I want to connect my Raspberry Pi 2 to an external MySQL database on 000webhost.com with the help of C++.
#include <stdlib.h>
#include <iostream>
#include "mysql_connection.h"
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/statement.h>
using namespace std;
int main(void)
{
try {
sql::Driver *driver;
sql::Connection *con;
sql::Statement *stmt;
sql::ResultSet *res;
/* Create a connection */
driver = get_driver_instance();
con = driver->connect("<000webhost mysql address>", "<username>", "<password>");
/* Connect to the MySQL test database */
con->setSchema("<database>");
stmt = con->createStatement();
res = stmt->executeQuery("<sql statement>"); // replace with your statement
while (res->next()) {
cout << "\t... MySQL replies: ";
/* Access column data by alias or column name */
cout << res->getString("_message") << endl;
cout << "\t... MySQL says it again: ";
/* Access column fata by numeric offset, 1 is the first column */
cout << res->getString(1) << endl;
}
delete res;
delete stmt;
delete con;
} catch (sql::SQLException &e) {
cout << "# ERR: SQLException in " << __FILE__;
cout << "(" << __FUNCTION__ << ") on line " »
<< __LINE__ << endl;
cout << "# ERR: " << e.what();
cout << " (MySQL error code: " << e.getErrorCode();
cout << ", SQLState: " << e.getSQLState() << " )" << endl;
}
cout << endl;
return EXIT_SUCCESS;
}
I got an error saying that the mysql_connection.h file was missing. I don't know what i did wrong or if there is an easier or simpler way. Please help me with this matter. Thanks.

Answer 1

I got an error saying that the mysql_connection.h file was missing.
Going by the error message you describe and the response to my question "Do you have the source installed for mysql_connection.h?," which was:
I didn't install mysql on the raspberry pi since I was trying to access an external database.
(Which is not what I asked.) it appears the reason #include "mysql_connection.h doesn't work is because the library isn't there.
The Connector/C library does not require the installation of MySQL, but the Connector/C source must be installed to include headers from the library, according to the documentation.
MySQL's Connector/C library requires boost; however Raspian already has boost installed, though that may come with it's own set of issue, which are discussed and resolved here if you have trouble with boost. (If your Raspberry Pi has NOOBS, I recommend switching to Raspian.)
Though the link is in my comments, instructions for installing the Connector/C library are available from MySQL's documentation.
I've collected some resources and links which should provide some additional help:
How to Install Third Party Libraries
How to #include third party libraries
Installing Connector/C++ from Source on Unix and Unix-Like Systems