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1 | package DBIx::Class::Storage::DBI::MSSQL; |
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2 | |
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3 | use strict; |
4 | use warnings; |
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5 | |
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6 | use base qw/DBIx::Class::Storage::DBI::AmbiguousGlob DBIx::Class::Storage::DBI/; |
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7 | use mro 'c3'; |
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8 | |
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9 | use List::Util(); |
10 | |
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11 | __PACKAGE__->mk_group_accessors(simple => qw/ |
12 | _identity _identity_method |
13 | /); |
14 | |
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15 | __PACKAGE__->sql_maker_class('DBIx::Class::SQLAHacks::MSSQL'); |
16 | |
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17 | sub insert_bulk { |
18 | my $self = shift; |
19 | my ($source, $cols, $data) = @_; |
20 | |
21 | my $identity_insert = 0; |
22 | |
23 | COLUMNS: |
24 | foreach my $col (@{$cols}) { |
25 | if ($source->column_info($col)->{is_auto_increment}) { |
26 | $identity_insert = 1; |
27 | last COLUMNS; |
28 | } |
29 | } |
30 | |
31 | if ($identity_insert) { |
32 | my $table = $source->from; |
33 | $self->dbh->do("SET IDENTITY_INSERT $table ON"); |
34 | } |
35 | |
36 | $self->next::method(@_); |
37 | |
38 | if ($identity_insert) { |
39 | my $table = $source->from; |
40 | $self->dbh->do("SET IDENTITY_INSERT $table OFF"); |
41 | } |
42 | } |
43 | |
44 | sub _prep_for_execute { |
45 | my $self = shift; |
46 | my ($op, $extra_bind, $ident, $args) = @_; |
47 | |
48 | # cast MONEY values properly |
49 | if ($op eq 'insert' || $op eq 'update') { |
50 | my $fields = $args->[0]; |
51 | my $col_info = $self->_resolve_column_info($ident, [keys %$fields]); |
52 | |
53 | for my $col (keys %$fields) { |
54 | if ($col_info->{$col}{data_type} =~ /^money\z/i) { |
55 | my $val = $fields->{$col}; |
56 | $fields->{$col} = \['CAST(? AS MONEY)', [ $col => $val ]]; |
57 | } |
58 | } |
59 | } |
60 | |
61 | my ($sql, $bind) = $self->next::method (@_); |
62 | |
63 | if ($op eq 'insert') { |
64 | $sql .= ';SELECT SCOPE_IDENTITY()'; |
65 | |
66 | my $col_info = $self->_resolve_column_info($ident, [map $_->[0], @{$bind}]); |
67 | if (List::Util::first { $_->{is_auto_increment} } (values %$col_info) ) { |
68 | |
69 | my $table = $ident->from; |
70 | my $identity_insert_on = "SET IDENTITY_INSERT $table ON"; |
71 | my $identity_insert_off = "SET IDENTITY_INSERT $table OFF"; |
72 | $sql = "$identity_insert_on; $sql; $identity_insert_off"; |
73 | } |
74 | } |
75 | |
76 | return ($sql, $bind); |
77 | } |
78 | |
79 | sub _execute { |
80 | my $self = shift; |
81 | my ($op) = @_; |
82 | |
83 | my ($rv, $sth, @bind) = $self->dbh_do($self->can('_dbh_execute'), @_); |
84 | if ($op eq 'insert') { |
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85 | $self->_identity($self->_fetch_identity($sth)); |
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86 | } |
87 | |
88 | return wantarray ? ($rv, $sth, @bind) : $rv; |
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89 | } |
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90 | |
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91 | sub _fetch_identity { |
92 | my ($self, $sth) = @_; |
93 | my ($identity) = $sth->fetchrow_array; |
94 | $sth->finish; |
95 | |
96 | if ((not defined $identity) && $self->_identity_method && |
97 | $self->_identity_method eq '@@identity') { |
98 | ($identity) = $self->_dbh->selectrow_array('select @@identity'); |
99 | } |
100 | |
101 | return $identity; |
102 | } |
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103 | |
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104 | sub last_insert_id { shift->_identity } |
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105 | |
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106 | # savepoint syntax is the same as in Sybase ASE |
107 | |
108 | sub _svp_begin { |
109 | my ($self, $name) = @_; |
110 | |
111 | $self->dbh->do("SAVE TRANSACTION $name"); |
112 | } |
113 | |
114 | # A new SAVE TRANSACTION with the same name releases the previous one. |
115 | sub _svp_release { 1 } |
116 | |
117 | sub _svp_rollback { |
118 | my ($self, $name) = @_; |
119 | |
120 | $self->dbh->do("ROLLBACK TRANSACTION $name"); |
121 | } |
122 | |
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123 | sub build_datetime_parser { |
124 | my $self = shift; |
125 | my $type = "DateTime::Format::Strptime"; |
126 | eval "use ${type}"; |
127 | $self->throw_exception("Couldn't load ${type}: $@") if $@; |
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128 | return $type->new( pattern => '%Y-%m-%d %H:%M:%S' ); # %F %T |
129 | } |
130 | |
131 | sub sqlt_type { 'SQLServer' } |
132 | |
133 | sub _sql_maker_opts { |
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134 | my ( $self, $opts ) = @_; |
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135 | |
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136 | if ( $opts ) { |
137 | $self->{_sql_maker_opts} = { %$opts }; |
138 | } |
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139 | |
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140 | return { limit_dialect => 'Top', %{$self->{_sql_maker_opts}||{}} }; |
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141 | } |
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142 | |
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143 | 1; |
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144 | |
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145 | =head1 NAME |
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146 | |
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147 | DBIx::Class::Storage::DBI::MSSQL - Base Class for Microsoft SQL Server support |
148 | in DBIx::Class |
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149 | |
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150 | =head1 SYNOPSIS |
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151 | |
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152 | This is the base class for Microsoft SQL Server support, used by |
153 | L<DBIx::Class::Storage::DBI::ODBC::Microsoft_SQL_Server> and |
154 | L<DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server>. |
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155 | |
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156 | =head1 IMPLEMENTATION NOTES |
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157 | |
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158 | Microsoft SQL Server supports three methods of retrieving the IDENTITY |
159 | value for inserted row: IDENT_CURRENT, @@IDENTITY, and SCOPE_IDENTITY(). |
160 | SCOPE_IDENTITY is used here because it is the safest. However, it must |
161 | be called is the same execute statement, not just the same connection. |
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162 | |
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163 | So, this implementation appends a SELECT SCOPE_IDENTITY() statement |
164 | onto each INSERT to accommodate that requirement. |
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165 | |
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166 | C<SELECT @@IDENTITY> can also be used by issuing: |
167 | |
168 | $self->_identity_method('@@identity'); |
169 | |
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170 | it will only be used if SCOPE_IDENTITY() fails. |
171 | |
172 | This is more dangerous, as inserting into a table with an on insert trigger that |
173 | inserts into another table with an identity will give erroneous results on |
174 | recent versions of SQL Server. |
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175 | |
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176 | =head1 AUTHOR |
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177 | |
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178 | See L<DBIx::Class/CONTRIBUTORS>. |
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179 | |
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180 | =head1 LICENSE |
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181 | |
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182 | You may distribute this code under the same terms as Perl itself. |
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183 | |
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184 | =cut |