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1 | package DBIx::Class::Storage::DBI::ODBC::Microsoft_SQL_Server; |
2 | use strict; |
3 | use warnings; |
4 | |
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5 | use base qw/DBIx::Class::Storage::DBI::MSSQL/; |
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6 | |
7 | sub _prep_for_execute { |
8 | my $self = shift; |
9 | my ($op, $extra_bind, $ident, $args) = @_; |
10 | |
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11 | my ($sql, $bind) = $self->next::method (@_); |
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12 | $sql .= ';SELECT SCOPE_IDENTITY()' if $op eq 'insert'; |
13 | |
14 | return ($sql, $bind); |
15 | } |
16 | |
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17 | sub _execute { |
18 | my $self = shift; |
19 | my ($op) = @_; |
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20 | |
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21 | my ($rv, $sth, @bind) = $self->dbh_do($self->can('_dbh_execute'), @_); |
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22 | if ($op eq 'insert') { |
23 | $self->{_scope_identity} = $sth->fetchrow_array; |
24 | $sth->finish; |
25 | } |
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26 | |
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27 | return wantarray ? ($rv, $sth, @bind) : $rv; |
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28 | } |
29 | |
30 | sub last_insert_id { shift->{_scope_identity} } |
31 | |
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32 | 1; |
33 | |
34 | __END__ |
35 | |
36 | =head1 NAME |
37 | |
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38 | DBIx::Class::Storage::DBI::ODBC::Microsoft_SQL_Server - Support specific |
39 | to Microsoft SQL Server over ODBC |
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40 | |
41 | =head1 DESCRIPTION |
42 | |
43 | This class implements support specific to Microsoft SQL Server over ODBC, |
44 | including auto-increment primary keys and SQL::Abstract::Limit dialect. It |
45 | is loaded automatically by by DBIx::Class::Storage::DBI::ODBC when it |
46 | detects a MSSQL back-end. |
47 | |
48 | =head1 IMPLEMENTATION NOTES |
49 | |
50 | Microsoft SQL Server supports three methods of retrieving the IDENTITY |
51 | value for inserted row: IDENT_CURRENT, @@IDENTITY, and SCOPE_IDENTITY(). |
52 | SCOPE_IDENTITY is used here because it is the safest. However, it must |
53 | be called is the same execute statement, not just the same connection. |
54 | |
55 | So, this implementation appends a SELECT SCOPE_IDENTITY() statement |
56 | onto each INSERT to accommodate that requirement. |
57 | |
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58 | =head1 AUTHORS |
59 | |
60 | Marc Mims C<< <marc@questright.com> >> |
61 | |
62 | =head1 LICENSE |
63 | |
64 | You may distribute this code under the same terms as Perl itself. |
65 | |
66 | =cut |