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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 | |
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7 | sub insert_bulk { |
8 | my ($self, $source, $cols, $data) = @_; |
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9 | |
10 | my $identity_insert = 0; |
11 | |
12 | COLUMNS: |
13 | foreach my $col (@{$cols}) { |
14 | if ($source->column_info($col)->{is_auto_increment}) { |
15 | $identity_insert = 1; |
16 | last COLUMNS; |
17 | } |
18 | } |
19 | |
20 | my $table = $source->from; |
21 | $source->storage->dbh_do(sub { |
22 | my ($storage, $dbh, @cols) = @_; |
23 | $dbh->do("SET IDENTITY_INSERT $table ON;"); |
24 | }); |
25 | |
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26 | next::method(@_); |
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27 | |
28 | $source->storage->dbh_do(sub { |
29 | my ($storage, $dbh, @cols) = @_; |
30 | $dbh->do("SET IDENTITY_INSERT $table OFF;"); |
31 | }); |
32 | |
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33 | } |
34 | |
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35 | sub _prep_for_execute { |
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36 | my $self = shift; |
37 | my ($op, $extra_bind, $ident, $args) = @_; |
38 | |
39 | my ($sql, $bind) = $self->next::method (@_); |
40 | $sql .= ';SELECT SCOPE_IDENTITY()' if $op eq 'insert'; |
41 | |
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42 | my %identity_insert_tables; |
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43 | my $col_info = $self->_resolve_column_info($ident, [map $_->[0], @{$bind}]); |
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44 | |
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45 | foreach my $bound (@{$bind}) { |
46 | my $col = $bound->[0]; |
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47 | if ($col_info->{$col}->{is_auto_increment}) { |
48 | my $table = $col_info->{$col}->{-result_source}->from; |
49 | $identity_insert_tables{$table} = 1; |
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50 | } |
51 | } |
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52 | |
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53 | my $identity_insert_on = join '', map { "SET IDENTITY_INSERT $_ ON; " } keys %identity_insert_tables; |
54 | my $identity_insert_off = join '', map { "SET IDENTITY_INSERT $_ OFF; " } keys %identity_insert_tables; |
55 | $sql = "$identity_insert_on $sql $identity_insert_off"; |
56 | |
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57 | return ($sql, $bind); |
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58 | } |
59 | |
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60 | sub _execute { |
61 | my $self = shift; |
62 | my ($op) = @_; |
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63 | |
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64 | my ($rv, $sth, @bind) = $self->dbh_do($self->can('_dbh_execute'), @_); |
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65 | if ($op eq 'insert') { |
66 | $self->{_scope_identity} = $sth->fetchrow_array; |
67 | $sth->finish; |
68 | } |
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69 | |
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70 | return wantarray ? ($rv, $sth, @bind) : $rv; |
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71 | } |
72 | |
73 | sub last_insert_id { shift->{_scope_identity} } |
74 | |
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75 | 1; |
76 | |
77 | __END__ |
78 | |
79 | =head1 NAME |
80 | |
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81 | DBIx::Class::Storage::DBI::ODBC::Microsoft_SQL_Server - Support specific |
82 | to Microsoft SQL Server over ODBC |
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83 | |
84 | =head1 DESCRIPTION |
85 | |
86 | This class implements support specific to Microsoft SQL Server over ODBC, |
87 | including auto-increment primary keys and SQL::Abstract::Limit dialect. It |
88 | is loaded automatically by by DBIx::Class::Storage::DBI::ODBC when it |
89 | detects a MSSQL back-end. |
90 | |
91 | =head1 IMPLEMENTATION NOTES |
92 | |
93 | Microsoft SQL Server supports three methods of retrieving the IDENTITY |
94 | value for inserted row: IDENT_CURRENT, @@IDENTITY, and SCOPE_IDENTITY(). |
95 | SCOPE_IDENTITY is used here because it is the safest. However, it must |
96 | be called is the same execute statement, not just the same connection. |
97 | |
98 | So, this implementation appends a SELECT SCOPE_IDENTITY() statement |
99 | onto each INSERT to accommodate that requirement. |
100 | |
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101 | =head1 AUTHORS |
102 | |
103 | Marc Mims C<< <marc@questright.com> >> |
104 | |
105 | =head1 LICENSE |
106 | |
107 | You may distribute this code under the same terms as Perl itself. |
108 | |
109 | =cut |
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110 | # vim: sw=2 sts=2 |