How to get SELECT to output escaped "\0" character - mysql

Question

When I run query #1:
SELECT * FROM $TABLE INTO OUTFILE $FILE CHARACTER SET utf8 FIELDS ESCAPED BY '\\\\' TERMINATED BY '|';
There is this one field value that is outputted as:
blah\0
I am trying to get identical output without using INTO OUTFILE.
query #2 with Perl code:
$query = $db->prepare("SELECT * FROM $TABLE");
$query->execute;
open(FILE_OUT, ">$FILE");
However, the same column above is outputted as
blah
So the \0 character (ASCII NUL) is outputted differently. How do I modify query #2 to output blah\0?
The modification could be in either MySQL query or Perl. The column's Collation is utf8_general_ci. I've tried using CONVERT($column using utf8) but that still displayed blah, and I'm not sure how I would apply it to every column of every table when outputting.
Update:
This Perl code worked in escaping the NUL character.
$row =~ s/\0/\\0/g;
But there are many other MySQL special characters, is there a way to escape them all at once instead of handling them one by one?

Answer 1

The quote method of the database handle should be able to quote any special characters:
my $sth = $dbh->prepare("select '\0'");
$sth->execute;
while (my $row = $sth->fetch) {
my ($col) = #$row;
print "[$col] is quoted as ", $dbh->quote($col), "\n";
}
On my version of MySQL this prints:
[] is quoted as '\0'
If I pipe that through hexdump -C we get
00000000 5b 00 5d 20 69 73 20 71 75 6f 74 65 64 20 61 73 |[.] is quoted as|
00000010 20 27 5c 30 27 0a | '\0'.|
00000016