override _columns_info_for instead of _extra_column_info in MSSQL
[dbsrgits/DBIx-Class-Schema-Loader.git] / lib / DBIx / Class / Schema / Loader / DBI / MSSQL.pm
1 package DBIx::Class::Schema::Loader::DBI::MSSQL;
2
3 use strict;
4 use warnings;
5 use base 'DBIx::Class::Schema::Loader::DBI::Sybase::Common';
6 use Carp::Clan qw/^DBIx::Class/;
7 use Class::C3;
8
9 our $VERSION = '0.05003';
10
11 =head1 NAME
12
13 DBIx::Class::Schema::Loader::DBI::MSSQL - DBIx::Class::Schema::Loader::DBI MSSQL Implementation.
14
15 =head1 DESCRIPTION
16
17 Base driver for Microsoft SQL Server, used by
18 L<DBIx::Class::Schema::Loader::DBI::Sybase::Microsoft_SQL_Server> for support
19 via L<DBD::Sybase> and
20 L<DBIx::Class::Schema::Loader::DBI::ODBC::Microsoft_SQL_Server> for support via
21 L<DBD::ODBC>.
22
23 See L<DBIx::Class::Schema::Loader> and L<DBIx::Class::Schema::Loader::Base> for
24 usage information.
25
26 =cut
27
28 sub _tables_list {
29     my $self = shift;
30
31     my $dbh = $self->schema->storage->dbh;
32     my $sth = $dbh->prepare(<<'EOF');
33 select t.table_name
34 from information_schema.tables t
35 where t.table_schema = ?
36 EOF
37     $sth->execute($self->db_schema);
38
39     my @tables = map lc $_, map @$_, @{ $sth->fetchall_arrayref };
40
41     return $self->_filter_tables(@tables);
42 }
43
44 sub _table_pk_info {
45     my ($self, $table) = @_;
46     my $dbh = $self->schema->storage->dbh;
47     my $sth = $dbh->prepare(qq{sp_pkeys '$table'});
48     $sth->execute;
49
50     my @keydata;
51
52     while (my $row = $sth->fetchrow_hashref) {
53         push @keydata, lc $row->{COLUMN_NAME};
54     }
55
56     return \@keydata;
57 }
58
59 sub _table_fk_info {
60     my ($self, $table) = @_;
61
62     my ($local_cols, $remote_cols, $remote_table, @rels);
63     my $dbh = $self->schema->storage->dbh;
64     my $sth = $dbh->prepare(qq{sp_fkeys \@FKTABLE_NAME = '$table'});
65     $sth->execute;
66
67     while (my $row = $sth->fetchrow_hashref) {
68         my $fk = $row->{FK_NAME};
69         push @{$local_cols->{$fk}}, lc $row->{FKCOLUMN_NAME};
70         push @{$remote_cols->{$fk}}, lc $row->{PKCOLUMN_NAME};
71         $remote_table->{$fk} = $row->{PKTABLE_NAME};
72     }
73
74     foreach my $fk (keys %$remote_table) {
75         push @rels, {
76                       local_columns => \@{$local_cols->{$fk}},
77                       remote_columns => \@{$remote_cols->{$fk}},
78                       remote_table => $remote_table->{$fk},
79                     };
80
81     }
82     return \@rels;
83 }
84
85 sub _table_uniq_info {
86     my ($self, $table) = @_;
87
88     my $dbh = $self->schema->storage->dbh;
89     my $sth = $dbh->prepare(qq{SELECT CCU.CONSTRAINT_NAME, CCU.COLUMN_NAME FROM INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE CCU
90                                JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS TC ON (CCU.CONSTRAINT_NAME = TC.CONSTRAINT_NAME)
91                                JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE KCU ON (CCU.CONSTRAINT_NAME = KCU.CONSTRAINT_NAME AND CCU.COLUMN_NAME = KCU.COLUMN_NAME)
92                                WHERE CCU.TABLE_NAME = @{[ $dbh->quote($table) ]} AND CONSTRAINT_TYPE = 'UNIQUE' ORDER BY KCU.ORDINAL_POSITION});
93     $sth->execute;
94     my $constraints;
95     while (my $row = $sth->fetchrow_hashref) {
96         my $name = lc $row->{CONSTRAINT_NAME};
97         my $col  = lc $row->{COLUMN_NAME};
98         push @{$constraints->{$name}}, $col;
99     }
100
101     my @uniqs = map { [ $_ => $constraints->{$_} ] } keys %$constraints;
102     return \@uniqs;
103 }
104
105 sub _columns_info_for {
106     my $self    = shift;
107     my ($table) = @_;
108
109     my $result = $self->next::method(@_);
110
111     while (my ($col, $info) = each %$result) {
112         my $dbh = $self->schema->storage->dbh;
113         my $sth = $dbh->prepare(qq{
114             SELECT COLUMN_NAME 
115             FROM INFORMATION_SCHEMA.COLUMNS
116             WHERE COLUMNPROPERTY(object_id(@{[ $dbh->quote($table) ]}, 'U'), @{[ $dbh->quote($col) ]}, 'IsIdentity') = 1
117               AND TABLE_NAME = @{[ $dbh->quote($table) ]} AND COLUMN_NAME = @{[ $dbh->quote($col) ]}
118         });
119         $sth->execute();
120
121         if ($sth->fetchrow_array) {
122             $info->{is_auto_increment} = 1;
123             $info->{data_type} =~ s/\s*identity//i;
124             delete $info->{size};
125         }
126
127 # get default
128         $sth = $dbh->prepare(qq{
129             SELECT COLUMN_DEFAULT
130             FROM INFORMATION_SCHEMA.COLUMNS
131             WHERE TABLE_NAME = @{[ $dbh->quote($table) ]} AND COLUMN_NAME = @{[ $dbh->quote($col) ]}
132         });
133         $sth->execute;
134         my ($default) = $sth->fetchrow_array;
135
136         if (defined $default) {
137             # strip parens
138             $default =~ s/^\( (.*) \)\z/$1/x;
139
140             # Literal strings are in ''s, numbers are in ()s (in some versions of
141             # MSSQL, in others they are unquoted) everything else is a function.
142             $info->{default_value} =
143                 $default =~ /^['(] (.*) [)']\z/x ? $1 :
144                     $default =~ /^\d/ ? $default : \$default;
145         }
146     }
147
148     return $result;
149 }
150
151 =head1 SEE ALSO
152
153 L<DBIx::Class::Schema::Loader::DBI::Sybase::Microsoft_SQL_Server>,
154 L<DBIx::Class::Schema::Loader::DBI::ODBC::Microsoft_SQL_Server>,
155 L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>,
156 L<DBIx::Class::Schema::Loader::DBI>
157
158 =head1 AUTHOR
159
160 See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>.
161
162 =head1 LICENSE
163
164 This library is free software; you can redistribute it and/or modify it under
165 the same terms as Perl itself.
166
167 =cut
168
169 1;