1 package DBIx::Class::Schema::Loader::DBI::MSSQL;
5 use base 'DBIx::Class::Schema::Loader::DBI::Sybase::Common';
6 use Carp::Clan qw/^DBIx::Class/;
9 __PACKAGE__->mk_group_accessors('simple', qw/
10 case_sensitive_collation
13 our $VERSION = '0.06000';
17 DBIx::Class::Schema::Loader::DBI::MSSQL - DBIx::Class::Schema::Loader::DBI MSSQL Implementation.
21 Base driver for Microsoft SQL Server, used by
22 L<DBIx::Class::Schema::Loader::DBI::Sybase::Microsoft_SQL_Server> for support
23 via L<DBD::Sybase> and
24 L<DBIx::Class::Schema::Loader::DBI::ODBC::Microsoft_SQL_Server> for support via
27 See L<DBIx::Class::Schema::Loader> and L<DBIx::Class::Schema::Loader::Base> for
30 =head1 CASE SENSITIVITY
32 Most MSSQL databases use C<CI> (case-insensitive) collation, for this reason
33 generated column names are lower-cased as this makes them easier to work with
36 We attempt to detect the database collation at startup, and set the column
37 lowercasing behavior accordingly, as lower-cased column names do not work on
38 case-sensitive databases.
40 If you are using FreeTDS with C<tds version> set to C<8.0> the collation
41 detection may fail, and Loader will default to case-insensitive mode. C<tds
42 version> C<7.0> will work fine.
46 case_sensitive_collation => 1
48 in your Loader options to override it.
52 sub _is_case_sensitive {
55 return $self->case_sensitive_collation ? 1 : 0;
63 return if defined $self->case_sensitive_collation;
65 my $dbh = $self->schema->storage->dbh;
67 # We use the sys.databases query for the general case, and fallback to
68 # databasepropertyex() if for some reason sys.databases is not available,
69 # which does not work over DBD::ODBC with unixODBC+FreeTDS.
71 # XXX why does databasepropertyex() not work over DBD::ODBC ?
73 # more on collations here: http://msdn.microsoft.com/en-us/library/ms143515.aspx
74 my ($collation_name) =
75 eval { $dbh->selectrow_array('SELECT collation_name FROM sys.databases WHERE name = DB_NAME()') }
76 || eval { $dbh->selectrow_array("SELECT databasepropertyex(DB_NAME(), 'Collation')") };
78 if (not $collation_name) {
81 WARNING: MSSQL Collation detection failed. Defaulting to case-insensitive mode.
82 Override the 'case_sensitive_collation' attribute in your Loader options if
85 $self->case_sensitive_collation(0);
89 my $case_sensitive = $collation_name =~ /_(?:CS|BIN2?)(?:_|\z)/;
91 $self->case_sensitive_collation($case_sensitive ? 1 : 0);
95 my ($self, $name) = @_;
97 return $self->case_sensitive_collation ? $name : lc($name);
101 my ($self, $opts) = @_;
103 my $dbh = $self->schema->storage->dbh;
104 my $sth = $dbh->prepare(<<'EOF');
106 FROM INFORMATION_SCHEMA.TABLES t
107 WHERE lower(t.table_schema) = ?
109 $sth->execute(lc $self->db_schema);
111 my @tables = map @$_, @{ $sth->fetchall_arrayref };
113 return $self->_filter_tables(\@tables, $opts);
117 my ($self, $table) = @_;
118 my $dbh = $self->schema->storage->dbh;
119 my $sth = $dbh->prepare(qq{sp_pkeys '$table'});
124 while (my $row = $sth->fetchrow_hashref) {
125 push @keydata, $self->_lc($row->{COLUMN_NAME});
132 my ($self, $table) = @_;
134 my ($local_cols, $remote_cols, $remote_table, @rels, $sth);
135 my $dbh = $self->schema->storage->dbh;
137 $sth = $dbh->prepare(qq{sp_fkeys \@fktable_name = '$table'});
141 while (my $row = eval { $sth->fetchrow_hashref }) {
142 my $fk = $row->{FK_NAME};
143 push @{$local_cols->{$fk}}, $self->_lc($row->{FKCOLUMN_NAME});
144 push @{$remote_cols->{$fk}}, $self->_lc($row->{PKCOLUMN_NAME});
145 $remote_table->{$fk} = $row->{PKTABLE_NAME};
148 foreach my $fk (keys %$remote_table) {
150 local_columns => \@{$local_cols->{$fk}},
151 remote_columns => \@{$remote_cols->{$fk}},
152 remote_table => $remote_table->{$fk},
159 sub _table_uniq_info {
160 my ($self, $table) = @_;
162 my $dbh = $self->schema->storage->dbh;
163 local $dbh->{FetchHashKeyName} = 'NAME_lc';
165 my $sth = $dbh->prepare(qq{
166 SELECT ccu.constraint_name, ccu.column_name
167 FROM INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE ccu
168 JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc on (ccu.constraint_name = tc.constraint_name)
169 JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE kcu on (ccu.constraint_name = kcu.constraint_name and ccu.column_name = kcu.column_name)
170 wHERE lower(ccu.table_name) = @{[ $dbh->quote(lc $table) ]} AND constraint_type = 'UNIQUE' ORDER BY kcu.ordinal_position
174 while (my $row = $sth->fetchrow_hashref) {
175 my $name = $row->{constraint_name};
176 my $col = $self->_lc($row->{column_name});
177 push @{$constraints->{$name}}, $col;
180 my @uniqs = map { [ $_ => $constraints->{$_} ] } keys %$constraints;
184 sub _columns_info_for {
188 my $result = $self->next::method(@_);
190 while (my ($col, $info) = each %$result) {
191 my $dbh = $self->schema->storage->dbh;
193 my $sth = $dbh->prepare(qq{
195 FROM INFORMATION_SCHEMA.COLUMNS
196 WHERE columnproperty(object_id(@{[ $dbh->quote(lc $table) ]}, 'U'), @{[ $dbh->quote(lc $col) ]}, 'IsIdentity') = 1
197 AND lower(table_name) = @{[ $dbh->quote(lc $table) ]} AND lower(column_name) = @{[ $dbh->quote(lc $col) ]}
199 if (eval { $sth->execute; $sth->fetchrow_array }) {
200 $info->{is_auto_increment} = 1;
201 $info->{data_type} =~ s/\s*identity//i;
202 delete $info->{size};
206 $sth = $dbh->prepare(qq{
207 SELECT column_default
208 FROM INFORMATION_SCHEMA.COLUMNS
209 wHERE lower(table_name) = @{[ $dbh->quote(lc $table) ]} AND lower(column_name) = @{[ $dbh->quote(lc $col) ]}
211 my ($default) = eval { $sth->execute; $sth->fetchrow_array };
213 if (defined $default) {
215 $default =~ s/^\( (.*) \)\z/$1/x;
217 # Literal strings are in ''s, numbers are in ()s (in some versions of
218 # MSSQL, in others they are unquoted) everything else is a function.
219 $info->{default_value} =
220 $default =~ /^['(] (.*) [)']\z/x ? $1 :
221 $default =~ /^\d/ ? $default : \$default;
230 L<DBIx::Class::Schema::Loader::DBI::Sybase::Microsoft_SQL_Server>,
231 L<DBIx::Class::Schema::Loader::DBI::ODBC::Microsoft_SQL_Server>,
232 L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>,
233 L<DBIx::Class::Schema::Loader::DBI>
237 See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>.
241 This library is free software; you can redistribute it and/or modify it under
242 the same terms as Perl itself.
247 # vim:et sts=4 sw=4 tw=0: