Thread: C++ connect to MySQL

  1. #1
    Registered User
    Join Date
    Nov 2006

    C++ connect to MySQL

    I have a program that access MySQL.

    I use the following method to connect to MySQL.

    void ConnectDB()
      HENV hEnv = NULL;
      HDBC hDBC = NULL;
      RETCODE retcode;        
      char* szUserName = (char*) sLogin.c_str();
      char* szPassword = (char*) strdbPassword.c_str();
      char* szDNS = (char*) sDSN.c_str();
      SQLAllocConnect (hEnv, &hDBC);
      retcode = SQLConnect (hDBC, (UCHAR*)szDNS, SQL_NTS, (UCHAR*)  szUserName, SQL_NTS, (UCHAR*)szPassword, SQL_NTS);
      if (retcode1 == SQL_SUCCESS || retcode1 == SQL_SUCCESS_WITH_INFO)
         printf("Database connect sucessfully.\n");
        printf("Database connect fail.\n");
      SQLDisconnect( hDBC );
      SQLFreeConnect( hDBC );
      SQLFreeEnv( hEnv );
    int main()
      while( 1 )
      return 0;
    When I run this program, I monitor the memory usage through Task Manager,
    I found that the memory usage will increase.

    I have done some reserch about the ODBC connection method, some claim that this method will cause memory leak some how.

    Can anyone help me on this?

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    > Can anyone help me on this?
    Maybe post it on the MySQL forum where there are likely to be a high concentration of people with vastly more experience of MySQL.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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