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my $dbh    = DBI->connect($DSN, $userid, $sesame, {
    AutoCommit => 0,
    RaiseError => 1,
    PrintError => 0
}) or die "Connection failed!\n" . $DBI::errstr;

my $dbh    = DBI->connect($DSN, $userid, $sesame, {
    AutoCommit => 1,
    RaiseError => 1,
    PrintError => 1
}) or die "Connection failed!\n" . $DBI::errstr;