libmysqlclient.18.dylib memory leak - c++

Question

PROBLEM: What's the cause of the memory leaks?
SITUATION:
I've build a simple command line program using C++ together with MySQL using the MySQL C API
The problem is, the program has many "minor" memory leaks from the object malloc xx bytes" with xx ranging from a few bytes to 8 kb. All of the leaks links to the library libmysqlclient.18.dylib.
I've already removed all the mysql_free_result() from the code to see if that was the problem, but its still the same.
My MySQL code mainly consists of simple code like:
to connect:
MYSQL *databaseConnection()
{
// declarations
MYSQL *connection = mysql_init(NULL);
// connecting to database
if(!mysql_real_connect(connection,SERVER,USER,PASSWORD,DATABASE,0,NULL,0))
{
std::cout << "Connection error: " << mysql_error(connection) << std::endl;
}
return connection;
}
executing a query:
MYSQL_RES *getQuery(MYSQL *connection, std::string query)
{
// send the query to the database
if (mysql_query(connection, query.c_str()))
{
std::cout << "MySQL query error: " << mysql_error(connection);
exit(1);
}
return mysql_store_result(connection);
}
example of a query:
void resetTable(std::string table)
{
MYSQL *connection = databaseConnection();
MYSQL_RES *result;
std::string query = "truncate table " + table;
result = getQuery(connection, query);
mysql_close(connection);
}

Answer 1

First of all: Opening a new connection for every query (like you're doing in resetTable()) is incredibly wasteful. What you really want to do is open a single connection when the application starts, use that for everything (possibly by storing the connection in a global), and close it when you're done.
To answer your question, though: You need to call mysql_free_result() on result sets once you're done with them.