BEGIN
{
   my $self = $0;  # or hardcode it, depending upon need
   if ( $ENV{'LD_LIBRARY_PATH'} !~ m|/path/you/want| )
   {
      $ENV{'LD_LIBRARY_PATH'} = "/path/you/want:$ENV{LD_LIBRARY_PATH}";
      exec $self, @ARGV;
   }
}

use DBI;