use DBI;
use strict;

my $db = DBI->connect(qq/DBI:CSV:/);
eval{$db->do('CREATE TABLE bug (a int, b int)')};
$db->do("INSERT INTO bug VALUES(0, 0)");
$db->do("update bug set a = 1");

eval{$db->do("update bug set b = 1 + 1")};
eval{$db->do("update bug set b = 1 - 1")};
eval{$db->do("update bug set b = 1 * 1")};
eval{$db->do("update bug set b = 1 / 1")};

##</code><code>##

DBD::CSV::db do failed: Can't use an undefined value as an ARRAY reference at /usr/lib/perl5/site_perl/5.10/SQL/Statement.pm line 1777, <GEN2> line 2.
 [for Statement "update bug set b = 1 + 1"] at /cygdrive/c/Users/Profesional/perl/databases/bug.pl line 9.
DBD::CSV::db do failed: Can't use an undefined value as an ARRAY reference at /usr/lib/perl5/site_perl/5.10/SQL/Statement.pm line 1777, <GEN3> line 2.
 [for Statement "update bug set b = 1 - 1"] at /cygdrive/c/Users/Profesional/perl/databases/bug.pl line 10.
DBD::CSV::db do failed: Can't use an undefined value as an ARRAY reference at /usr/lib/perl5/site_perl/5.10/SQL/Statement.pm line 1777, <GEN4> line 2.
 [for Statement "update bug set b = 1 * 1"] at /cygdrive/c/Users/Profesional/perl/databases/bug.pl line 11.
DBD::CSV::db do failed: Can't use an undefined value as an ARRAY reference at /usr/lib/perl5/site_perl/5.10/SQL/Statement.pm line 1777, <GEN5> line 2.
 [for Statement "update bug set b = 1 / 1"] at /cygdrive/c/Users/Profesional/perl/databases/bug.pl line 12.