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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 = $source->from; |
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21 | if ($identity_insert) { |
22 | $source->storage->dbh_do(sub { |
23 | my ($storage, $dbh, @cols) = @_; |
24 | $dbh->do("SET IDENTITY_INSERT $table ON;"); |
25 | }); |
26 | } |
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27 | |
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28 | next::method(@_); |
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29 | |
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30 | if ($identity_insert) { |
31 | $source->storage->dbh_do(sub { |
32 | my ($storage, $dbh, @cols) = @_; |
33 | $dbh->do("SET IDENTITY_INSERT $table OFF;"); |
34 | }); |
35 | } |
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36 | |
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37 | } |
38 | |
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39 | sub _prep_for_execute { |
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40 | my $self = shift; |
41 | my ($op, $extra_bind, $ident, $args) = @_; |
42 | |
43 | my ($sql, $bind) = $self->next::method (@_); |
44 | $sql .= ';SELECT SCOPE_IDENTITY()' if $op eq 'insert'; |
45 | |
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46 | my %identity_insert_tables; |
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47 | my $col_info = $self->_resolve_column_info($ident, [map $_->[0], @{$bind}]); |
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48 | |
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49 | foreach my $bound (@{$bind}) { |
50 | my $col = $bound->[0]; |
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51 | if ($col_info->{$col}->{is_auto_increment}) { |
52 | my $table = $col_info->{$col}->{-result_source}->from; |
53 | $identity_insert_tables{$table} = 1; |
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54 | } |
55 | } |
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56 | |
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57 | my $identity_insert_on = join '', map { "SET IDENTITY_INSERT $_ ON; " } keys %identity_insert_tables; |
58 | my $identity_insert_off = join '', map { "SET IDENTITY_INSERT $_ OFF; " } keys %identity_insert_tables; |
59 | $sql = "$identity_insert_on $sql $identity_insert_off"; |
60 | |
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61 | return ($sql, $bind); |
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62 | } |
63 | |
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64 | sub _execute { |
65 | my $self = shift; |
66 | my ($op) = @_; |
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67 | |
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68 | my ($rv, $sth, @bind) = $self->dbh_do($self->can('_dbh_execute'), @_); |
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69 | if ($op eq 'insert') { |
70 | $self->{_scope_identity} = $sth->fetchrow_array; |
71 | $sth->finish; |
72 | } |
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73 | |
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74 | return wantarray ? ($rv, $sth, @bind) : $rv; |
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75 | } |
76 | |
77 | sub last_insert_id { shift->{_scope_identity} } |
78 | |
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79 | 1; |
80 | |
81 | __END__ |
82 | |
83 | =head1 NAME |
84 | |
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85 | DBIx::Class::Storage::DBI::ODBC::Microsoft_SQL_Server - Support specific |
86 | to Microsoft SQL Server over ODBC |
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87 | |
88 | =head1 DESCRIPTION |
89 | |
90 | This class implements support specific to Microsoft SQL Server over ODBC, |
91 | including auto-increment primary keys and SQL::Abstract::Limit dialect. It |
92 | is loaded automatically by by DBIx::Class::Storage::DBI::ODBC when it |
93 | detects a MSSQL back-end. |
94 | |
95 | =head1 IMPLEMENTATION NOTES |
96 | |
97 | Microsoft SQL Server supports three methods of retrieving the IDENTITY |
98 | value for inserted row: IDENT_CURRENT, @@IDENTITY, and SCOPE_IDENTITY(). |
99 | SCOPE_IDENTITY is used here because it is the safest. However, it must |
100 | be called is the same execute statement, not just the same connection. |
101 | |
102 | So, this implementation appends a SELECT SCOPE_IDENTITY() statement |
103 | onto each INSERT to accommodate that requirement. |
104 | |
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105 | =head1 AUTHORS |
106 | |
107 | Marc Mims C<< <marc@questright.com> >> |
108 | |
109 | =head1 LICENSE |
110 | |
111 | You may distribute this code under the same terms as Perl itself. |
112 | |
113 | =cut |
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114 | # vim: sw=2 sts=2 |