DBD::CSV::st execute failed:
Execution ERROR: No such column 'PRINT."set"'.

 [for Statement "
      SELECT id,
             gid,
             card,
             "set",
             illus,
             num
        FROM Print
   "] at problem.pl line 41.

##</code><code>##

>perl -le"use SQL::Statement; print SQL::Statement->VERSION"
1.15

>perl -le"use DBD::CSV; print DBD::CSV->VERSION"
0.22

##</code><code>##

use strict;
use warnings;

use DBI                   qw( );
use File::Spec::Functions qw( catfile );

{
   my $db     = '.';
   my $dsn    = "dbi:CSV:f_dir=$db";
   my $user   = undef;
   my $passwd = undef;

   my $dbh = DBI->connect(
      $dsn, $user, $passwd, 
      {
         RaiseError       => 1,
         PrintError       => 0,
         PrintWarn        => 1,
         AutoCommit       => 1,          # No writing, so no need for transactions.
         FetchHashKeyName => 'NAME_lc',
      }
   );

   for (qw( Print )) {
      my $path = catfile($db, "$_.csv");
      # Xyz and "Xyz" are erroneously considered different tables.
      $dbh->{csv_tables}{    $_  }{file} = $path;
      $dbh->{csv_tables}{qq{"$_"}}{file} = $path;
   }

   my $sth = $dbh->prepare('
      SELECT id,
             gid,
             card,
             "set",
             illus,
             num
        FROM Print
   ');

   $sth->execute();

   # ...
}

##</code><code>##

id,gid,card,set,illus,num
1,1,1,1,"Foo Bar",1