Re: [Boost-users] [boost::system] Is the library abstraction general enough?

23 Feb 2009

      Boris Schaeling:
...
On Fri, 20 Feb 2009 09:36:53 +0100, Lian Cheng  
wrote:
Isn't there a list of error numbers and error strings MySQL uses? I ask 
as calling error_category::message() should also return an error string 
even if no MySQL connection is used?
Unfortunately, no. As I've mentioned, the error strings MySQL uses are 
printf format strings, such as:

     Using unsupported buffer type: %d  (parameter: %d)

And you always need an active MySQL connection handle to obtain the full 
error message by calling mysql_error(). And you can never get the 
message back once you close the connection:

     MYSQL* conn = mysql_init( 0 );
     // do something causes an error.
     mysql_close( conn );
     printf( "error: %s", mysql_error( conn ) ); // Messed up.
...
Boris