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  1. or download this
    use DBI qw(:sql_types);
    # ...
    ...
    $sth->bind_param( 1, 'test', SQL_TEXT );
    $sth->bind_param( 2, nfreeze($test), SQL_BINARY );
    $sth->execute;
    
  2. or download this
    __SIG__
    use B;
    printf "You are here %08x\n", unpack "L!", unpack "P4", pack
      "L!", B::svref_2object(sub{})->OUTSIDE;