my $dbh = $self->_connect(@args);
return undef if !$dbh;
my $initial_sql = $self->get_initial_sql;
$dbh->do($initial_sql) if $initial_sql;
my $dbh = $self->_connect(@args);
return undef if !$dbh;
my $initial_sql = $self->get_initial_sql;
$dbh->do($initial_sql) if $initial_sql;