int
mysql_stmt_fetch_column(MYSQL_STMT *stmt,
                        MYSQL_BIND *bind,
                        unsigned int column,
                        unsigned long offset)
          Fetches one column from the current result set row.
          bind provides the buffer where data should
          be placed. It should be set up the same way as for
          mysql_stmt_bind_result().
          column indicates which column to fetch. The
          first column is numbered 0. offset is the
          offset within the data value at which to begin retrieving
          data. This can be used for fetching the data value in pieces.
          The beginning of the value is offset 0.
        
- 
Invalid column number. 
- 
The end of the result set has already been reached.