use warnings;
use base qw/DBIx::Class::Storage::DBI::AmbiguousGlob DBIx::Class::Storage::DBI/;
+use mro 'c3';
+
+use List::Util();
+
+__PACKAGE__->mk_group_accessors(simple => qw/
+ _identity _identity_method
+/);
__PACKAGE__->sql_maker_class('DBIx::Class::SQLAHacks::MSSQL');
-sub _dbh_last_insert_id {
- my ($self, $dbh, $source, $col) = @_;
- my ($id) = $dbh->selectrow_array('SELECT SCOPE_IDENTITY()');
- return $id;
+sub insert_bulk {
+ my $self = shift;
+ my ($source, $cols, $data) = @_;
+
+ my $identity_insert = 0;
+
+ COLUMNS:
+ foreach my $col (@{$cols}) {
+ if ($source->column_info($col)->{is_auto_increment}) {
+ $identity_insert = 1;
+ last COLUMNS;
+ }
+ }
+
+ if ($identity_insert) {
+ my $table = $source->from;
+ $self->dbh->do("SET IDENTITY_INSERT $table ON");
+ }
+
+ $self->next::method(@_);
+
+ if ($identity_insert) {
+ my $table = $source->from;
+ $self->dbh->do("SET IDENTITY_INSERT $table OFF");
+ }
+}
+
+# support MSSQL GUID column types
+
+sub insert {
+ my $self = shift;
+ my ($source, $to_insert) = @_;
+
+ my $updated_cols = {};
+
+ my %guid_cols;
+ my @pk_cols = $source->primary_columns;
+ my %pk_cols;
+ @pk_cols{@pk_cols} = ();
+
+ my @pk_guids = grep {
+ $source->column_info($_)->{data_type} =~ /^uniqueidentifier/i
+ } @pk_cols;
+
+ my @auto_guids = grep {
+ $source->column_info($_)->{data_type} =~ /^uniqueidentifier/i
+ &&
+ $source->column_info($_)->{auto_nextval}
+ } grep { not exists $pk_cols{$_} } $source->columns;
+
+ my @get_guids_for =
+ grep { not exists $to_insert->{$_} } (@pk_guids, @auto_guids);
+
+ for my $guid_col (@get_guids_for) {
+ my ($new_guid) = $self->dbh->selectrow_array('SELECT NEWID()');
+ $updated_cols->{$guid_col} = $to_insert->{$guid_col} = $new_guid;
+ }
+
+ $updated_cols = { %$updated_cols, %{ $self->next::method(@_) } };
+
+ return $updated_cols;
+}
+
+sub _prep_for_execute {
+ my $self = shift;
+ my ($op, $extra_bind, $ident, $args) = @_;
+
+# cast MONEY values properly
+ if ($op eq 'insert' || $op eq 'update') {
+ my $fields = $args->[0];
+ my $col_info = $self->_resolve_column_info($ident, [keys %$fields]);
+
+ for my $col (keys %$fields) {
+ if ($col_info->{$col}{data_type} =~ /^money\z/i) {
+ my $val = $fields->{$col};
+ $fields->{$col} = \['CAST(? AS MONEY)', [ $col => $val ]];
+ }
+ }
+ }
+
+ my ($sql, $bind) = $self->next::method (@_);
+
+ if ($op eq 'insert') {
+ $sql .= ';SELECT SCOPE_IDENTITY()';
+
+ my $col_info = $self->_resolve_column_info($ident, [map $_->[0], @{$bind}]);
+ if (List::Util::first { $_->{is_auto_increment} } (values %$col_info) ) {
+
+ my $table = $ident->from;
+ my $identity_insert_on = "SET IDENTITY_INSERT $table ON";
+ my $identity_insert_off = "SET IDENTITY_INSERT $table OFF";
+ $sql = "$identity_insert_on; $sql; $identity_insert_off";
+ }
+ }
+
+ return ($sql, $bind);
+}
+
+sub _execute {
+ my $self = shift;
+ my ($op) = @_;
+
+ my ($rv, $sth, @bind) = $self->dbh_do($self->can('_dbh_execute'), @_);
+ if ($op eq 'insert') {
+ $self->_identity($self->_fetch_identity($sth));
+ }
+
+ return wantarray ? ($rv, $sth, @bind) : $rv;
+}
+
+sub _fetch_identity {
+ my ($self, $sth) = @_;
+ my ($identity) = $sth->fetchrow_array;
+ $sth->finish;
+
+ if ((not defined $identity) && $self->_identity_method) {
+ ($identity) = $self->_dbh->selectrow_array(
+ 'select ' . $self->_identity_method
+ );
+ }
+
+ return $identity;
+}
+
+sub last_insert_id { shift->_identity }
+
+# savepoint syntax is the same as in Sybase ASE
+
+sub _svp_begin {
+ my ($self, $name) = @_;
+
+ $self->dbh->do("SAVE TRANSACTION $name");
+}
+
+# A new SAVE TRANSACTION with the same name releases the previous one.
+sub _svp_release { 1 }
+
+sub _svp_rollback {
+ my ($self, $name) = @_;
+
+ $self->dbh->do("ROLLBACK TRANSACTION $name");
}
sub build_datetime_parser {
sub sqlt_type { 'SQLServer' }
sub _sql_maker_opts {
- my ( $self, $opts ) = @_;
+ my ( $self, $opts ) = @_;
- if ( $opts ) {
- $self->{_sql_maker_opts} = { %$opts };
- }
+ if ( $opts ) {
+ $self->{_sql_maker_opts} = { %$opts };
+ }
- return { limit_dialect => 'Top', %{$self->{_sql_maker_opts}||{}} };
+ return { limit_dialect => 'Top', %{$self->{_sql_maker_opts}||{}} };
}
1;
=head1 NAME
-DBIx::Class::Storage::DBI::MSSQL - Storage::DBI subclass for MSSQL
+DBIx::Class::Storage::DBI::MSSQL - Base Class for Microsoft SQL Server support
+in DBIx::Class
=head1 SYNOPSIS
-This subclass supports MSSQL, and can in theory be used directly
-via the C<storage_type> mechanism:
+This is the base class for Microsoft SQL Server support, used by
+L<DBIx::Class::Storage::DBI::ODBC::Microsoft_SQL_Server> and
+L<DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server>.
- $schema->storage_type('::DBI::MSSQL');
- $schema->connect_info('dbi:....', ...);
+=head1 IMPLEMENTATION NOTES
-However, as there is no L<DBD::MSSQL>, you will probably want to use
-one of the other DBD-specific MSSQL classes, such as
-L<DBIx::Class::Storage::DBI::Sybase::MSSQL>. These classes will
-merge this class with a DBD-specific class to obtain fully
-correct behavior for your scenario.
+Microsoft SQL Server supports three methods of retrieving the IDENTITY
+value for inserted row: IDENT_CURRENT, @@IDENTITY, and SCOPE_IDENTITY().
+SCOPE_IDENTITY is used here because it is the safest. However, it must
+be called is the same execute statement, not just the same connection.
-=head1 METHODS
+So, this implementation appends a SELECT SCOPE_IDENTITY() statement
+onto each INSERT to accommodate that requirement.
-=head2 last_insert_id
+C<SELECT @@IDENTITY> can also be used by issuing:
-=head2 sqlt_type
+ $self->_identity_method('@@identity');
-=head2 build_datetime_parser
+it will only be used if SCOPE_IDENTITY() fails.
-The resulting parser handles the MSSQL C<DATETIME> type, but is almost
-certainly not sufficient for the other MSSQL 2008 date/time types.
+This is more dangerous, as inserting into a table with an on insert trigger that
+inserts into another table with an identity will give erroneous results on
+recent versions of SQL Server.
-=head1 AUTHORS
+=head1 AUTHOR
-Brian Cassidy <bricas@cpan.org>
+See L<DBIx::Class/CONTRIBUTORS>.
=head1 LICENSE