mysql_stmt_fetch_column - Fetches a single column into bind
  buffer
  
  - 
    #include <mysql.h>
int mysql_stmt_fetch_column(MYSQL_STMT * stmt,
 MYSQL_BIND * bind_arg,
 unsigned int column,
 unsigned long offset);
 
This function can be used to fetch large data of a single column
    in pieces.
  - •
- stmt - a statement handle, which was previously
      allocated by mysql_stmt_init(3).
- •
- bind_arg - a pointer to a MYSQL_BIND
    structure.
- •
- column - number of column, first column is
      numbered zero.
- •
- offset - offset at which to begin retrieving
    data.
Returns zero on success, non-zero on failure.
  - •
- The size of the buffer is specified within MYSQL_BIND structure.
  - •
- mysql_stmt_fetch(3)
- •
- mysql_stmt_send_long_data(3)