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Cannot connect to a MySQL database from a C++ program with MySQL Connector/C++: exception thrown
Posted by: Pietro Mele
Date: February 06, 2013 04:35AM

I have a connection problem to a MySQL database from a C++ program:

std::string server, user, password;
SetParams(server, user, password);
boost::shared_ptr<sql::Connection> conn;
sql::Driver *driver = get_driver_instance();

if(driver == 0) { /* error; never reached */ }

try {
conn.reset(driver->connect(server, user, password));

assert(conn != 0);

if(!conn->isClosed()) // <-- exception thrown
{
// Connection established
}
else {
// Connection failed
}
}
catch (sql::SQLException &e)
{
cerr << e.what << e.getErrorCode() << e.getSQLState() << endl;
}
The sql::Connection::isClosed() function throws this exception:

SQLException: Connection has been closed
MySQL error code: 0
SQLState: HY000
The values for server, user and password are correct (they work connecting from MySQL-Workbench), the DB is up and running.

I do not know where else to look...
Thank you.

Platform:
Linux - OpenSuse 11.4
MySQL 5.x
MySQL Connector/C++ 1.0.5

*** UPDATE ***

The code as shown here works correctly. The problem must be somewhere else in the program...



Edited 1 time(s). Last edit at 02/06/2013 10:57AM by Pietro Mele.

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