1 package DBIx::Class::Storage::DBI::ODBC::Microsoft_SQL_Server;
5 use base qw/DBIx::Class::Storage::DBI::MSSQL/;
7 sub _prep_for_execute {
9 my ($op, $extra_bind, $ident, $args) = @_;
11 my ($sql, $bind) = $self->next::method (@_);
12 $sql .= ';SELECT SCOPE_IDENTITY()' if $op eq 'insert';
14 my $alias2src = $self->_resolve_ident_sources($ident);
15 my %identity_insert_tables;
16 foreach my $bound (@{$bind}) {
17 my $col = $bound->[0];
18 my $name_sep = $self->_sql_maker_opts->{name_sep} || '.';
20 $col =~ s/^([^\Q${name_sep}\E]*)\Q${name_sep}\E//;
21 my $alias = $1 || 'me';
22 my $rsrc = $alias2src->{$alias};
24 my $is_auto_increment = $rsrc && $rsrc->column_info($col)->{is_auto_increment};
26 if ($is_auto_increment) {
27 $identity_insert_tables{$rsrc->from} = 1;
31 my $identity_insert_on = join '', map { "SET IDENTITY_INSERT $_ ON; " } keys %identity_insert_tables;
32 my $identity_insert_off = join '', map { "SET IDENTITY_INSERT $_ OFF; " } keys %identity_insert_tables;
33 $sql = "$identity_insert_on $sql $identity_insert_off";
42 my ($rv, $sth, @bind) = $self->dbh_do($self->can('_dbh_execute'), @_);
43 if ($op eq 'insert') {
44 $self->{_scope_identity} = $sth->fetchrow_array;
48 return wantarray ? ($rv, $sth, @bind) : $rv;
51 sub last_insert_id { shift->{_scope_identity} }
59 DBIx::Class::Storage::DBI::ODBC::Microsoft_SQL_Server - Support specific
60 to Microsoft SQL Server over ODBC
64 This class implements support specific to Microsoft SQL Server over ODBC,
65 including auto-increment primary keys and SQL::Abstract::Limit dialect. It
66 is loaded automatically by by DBIx::Class::Storage::DBI::ODBC when it
67 detects a MSSQL back-end.
69 =head1 IMPLEMENTATION NOTES
71 Microsoft SQL Server supports three methods of retrieving the IDENTITY
72 value for inserted row: IDENT_CURRENT, @@IDENTITY, and SCOPE_IDENTITY().
73 SCOPE_IDENTITY is used here because it is the safest. However, it must
74 be called is the same execute statement, not just the same connection.
76 So, this implementation appends a SELECT SCOPE_IDENTITY() statement
77 onto each INSERT to accommodate that requirement.
81 Marc Mims C<< <marc@questright.com> >>
85 You may distribute this code under the same terms as Perl itself.