my %rec;
my $sth1 = $dbh->prepare ("select * from foo");
my @fields = @{$sth1->{NAME_lc}};
$sth1->bind_columns (\@rec{@{$sth1->{NAME_lc}}});

my $sth2 = do {
    local $" = ", ";
    $dbh->prepare ("insert into bar (@fields) values (@{[('?')x@fields]})");
    };
$sth2->bind_columns (\@rec{@fields});
while ($sth1->fetch) {
    $sth2->execute;
    }