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my $Cookie1 = $cgi->cookie('C1'); 
my $Cookie2 = $cgi->cookie('C2'); 
my ($f1, $f2); 
...
      $Cookie2 = cookie('C2'); 
      $f1 = $rec->{field_1}; 
      $f2 = $rec->{field_2};

if (my $rec = $sth->fetchrow_hashref) { 
      $Cookie2 = cookie('C2'); 
      $f1 = $rec->{field_X};