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1 | package DBIx::Class::Schema::Loader::DBI; |
2 | |
3 | use strict; |
4 | use warnings; |
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5 | use base qw/DBIx::Class::Schema::Loader::Base/; |
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6 | use Class::C3; |
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7 | use Carp::Clan qw/^DBIx::Class/; |
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8 | use UNIVERSAL::require; |
9 | |
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10 | our $VERSION = '0.03999_01'; |
11 | |
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12 | =head1 NAME |
13 | |
14 | DBIx::Class::Schema::Loader::DBI - DBIx::Class::Schema::Loader DBI Implementation. |
15 | |
16 | =head1 SYNOPSIS |
17 | |
18 | See L<DBIx::Class::Schema::Loader::Base> |
19 | |
20 | =head1 DESCRIPTION |
21 | |
22 | This is the base class for L<DBIx::Class::Schema::Loader::Base> classes for |
23 | DBI-based storage backends, and implements the common functionality between them. |
24 | |
25 | See L<DBIx::Class::Schema::Loader::Base> for the available options. |
26 | |
27 | =head1 METHODS |
28 | |
29 | =head2 new |
30 | |
31 | Overlays L<DBIx::Class::Schema::Loader::Base/new> to do some DBI-specific |
32 | things. |
33 | |
34 | =cut |
35 | |
36 | sub new { |
37 | my $self = shift->next::method(@_); |
38 | |
39 | # rebless to vendor-specific class if it exists and loads |
40 | my $dbh = $self->schema->storage->dbh; |
41 | my $driver = $dbh->{Driver}->{Name}; |
42 | my $subclass = 'DBIx::Class::Schema::Loader::DBI::' . $driver; |
43 | $subclass->require; |
44 | if($@ && $@ !~ /^Can't locate /) { |
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45 | croak "Failed to require $subclass: $@"; |
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46 | } |
47 | elsif(!$@) { |
48 | bless $self, "DBIx::Class::Schema::Loader::DBI::${driver}"; |
49 | } |
50 | |
51 | # Set up the default quoting character and name seperators |
52 | $self->{_quoter} = $self->schema->storage->sql_maker->quote_char |
53 | || $dbh->get_info(29) |
54 | || q{"}; |
55 | |
56 | $self->{_namesep} = $self->schema->storage->sql_maker->name_sep |
57 | || $dbh->get_info(41) |
58 | || q{.}; |
59 | |
60 | # For our usage as regex matches, concatenating multiple quoter |
61 | # values works fine (e.g. s/\Q<>\E// if quoter was [ '<', '>' ]) |
62 | if( ref $self->{_quoter} eq 'ARRAY') { |
63 | $self->{_quoter} = join(q{}, @{$self->{_quoter}}); |
64 | } |
65 | |
66 | $self->_setup; |
67 | |
68 | $self; |
69 | } |
70 | |
71 | # Override this in vendor modules to do things at the end of ->new() |
72 | sub _setup { } |
73 | |
74 | # Returns an array of table names |
75 | sub _tables_list { |
76 | my $self = shift; |
77 | |
78 | my $dbh = $self->schema->storage->dbh; |
79 | my @tables = $dbh->tables(undef, $self->db_schema, '%', '%'); |
80 | s/\Q$self->{_quoter}\E//g for @tables; |
81 | s/^.*\Q$self->{_namesep}\E// for @tables; |
82 | |
83 | return @tables; |
84 | } |
85 | |
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86 | =head2 load |
87 | |
88 | We override L<DBIx::Class::Schema::Loader::Base/load> here to hook in our localized settings for C<$dbh> error handling. |
89 | |
90 | =cut |
91 | |
92 | sub load { |
93 | my $self = shift; |
94 | |
95 | local $self->schema->storage->dbh->{RaiseError} = 1; |
96 | local $self->schema->storage->dbh->{PrintError} = 0; |
97 | $self->next::method(@_); |
98 | } |
99 | |
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100 | # Returns an arrayref of column names |
101 | sub _table_columns { |
102 | my ($self, $table) = @_; |
103 | |
104 | my $dbh = $self->schema->storage->dbh; |
105 | |
106 | if($self->{db_schema}) { |
107 | $table = $self->{db_schema} . $self->{_namesep} . $table; |
108 | } |
109 | |
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110 | my $sth = $dbh->prepare($self->schema->storage->sql_maker->select($table, undef, \'1 = 0')); |
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111 | $sth->execute; |
112 | return \@{$sth->{NAME_lc}}; |
113 | } |
114 | |
115 | # Returns arrayref of pk col names |
116 | sub _table_pk_info { |
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117 | my ($self, $table) = @_; |
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118 | |
119 | my $dbh = $self->schema->storage->dbh; |
120 | |
121 | my @primary = map { lc } $dbh->primary_key('', $self->db_schema, $table); |
122 | s/\Q$self->{_quoter}\E//g for @primary; |
123 | |
124 | return \@primary; |
125 | } |
126 | |
fd589700 |
127 | # Override this for vendor-specific uniq info |
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128 | sub _table_uniq_info { |
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129 | my ($self, $table) = @_; |
130 | |
131 | my $dbh = $self->schema->storage->dbh; |
132 | if(!$dbh->can('statistics_info')) { |
133 | warn "No UNIQUE constraint information can be gathered for this vendor"; |
134 | return []; |
135 | } |
136 | |
137 | my %indices; |
138 | my $sth = $dbh->statistics_info(undef, $self->db_schema, $table, 1, 1); |
139 | while(my $row = $sth->fetchrow_hashref) { |
140 | # skip table-level stats, conditional indexes, and any index missing |
141 | # critical fields |
142 | next if $row->{TYPE} eq 'table' |
143 | || defined $row->{FILTER_CONDITION} |
144 | || !$row->{INDEX_NAME} |
145 | || !defined $row->{ORDINAL_POSITION} |
146 | || !$row->{COLUMN_NAME}; |
147 | |
148 | $indices{$row->{INDEX_NAME}}->{$row->{ORDINAL_POSITION}} = $row->{COLUMN_NAME}; |
149 | } |
150 | |
151 | my @retval; |
152 | foreach my $index_name (keys %indices) { |
153 | my $index = $indices{$index_name}; |
154 | push(@retval, [ $index_name => [ |
155 | map { $index->{$_} } |
156 | sort keys %$index |
157 | ]]); |
158 | } |
159 | |
160 | return \@retval; |
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161 | } |
162 | |
163 | # Find relationships |
164 | sub _table_fk_info { |
165 | my ($self, $table) = @_; |
166 | |
167 | my $dbh = $self->schema->storage->dbh; |
168 | my $sth = $dbh->foreign_key_info( '', '', '', '', |
169 | $self->db_schema, $table ); |
170 | return [] if !$sth; |
171 | |
172 | my %rels; |
173 | |
174 | my $i = 1; # for unnamed rels, which hopefully have only 1 column ... |
175 | while(my $raw_rel = $sth->fetchrow_arrayref) { |
176 | my $uk_tbl = $raw_rel->[2]; |
177 | my $uk_col = lc $raw_rel->[3]; |
178 | my $fk_col = lc $raw_rel->[7]; |
179 | my $relid = ($raw_rel->[11] || ( "__dcsld__" . $i++ )); |
180 | $uk_tbl =~ s/\Q$self->{_quoter}\E//g; |
181 | $uk_col =~ s/\Q$self->{_quoter}\E//g; |
182 | $fk_col =~ s/\Q$self->{_quoter}\E//g; |
183 | $relid =~ s/\Q$self->{_quoter}\E//g; |
184 | $rels{$relid}->{tbl} = $uk_tbl; |
185 | $rels{$relid}->{cols}->{$uk_col} = $fk_col; |
186 | } |
187 | |
188 | my @rels; |
189 | foreach my $relid (keys %rels) { |
190 | push(@rels, { |
191 | remote_columns => [ keys %{$rels{$relid}->{cols}} ], |
192 | local_columns => [ values %{$rels{$relid}->{cols}} ], |
193 | remote_table => $rels{$relid}->{tbl}, |
194 | }); |
195 | } |
196 | |
197 | return \@rels; |
198 | } |
199 | |
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200 | # ported in from DBIx::Class::Storage::DBI: |
201 | sub _columns_info_for { |
202 | my ($self, $table) = @_; |
203 | |
204 | my $dbh = $self->schema->storage->dbh; |
205 | |
206 | if ($dbh->can('column_info')) { |
207 | my %result; |
208 | eval { |
209 | my $sth = $dbh->column_info( undef, $self->db_schema, $table, '%' ); |
210 | $sth->execute(); |
211 | while ( my $info = $sth->fetchrow_hashref() ){ |
212 | my %column_info; |
213 | $column_info{data_type} = $info->{TYPE_NAME}; |
214 | $column_info{size} = $info->{COLUMN_SIZE}; |
215 | $column_info{is_nullable} = $info->{NULLABLE} ? 1 : 0; |
216 | $column_info{default_value} = $info->{COLUMN_DEF}; |
217 | my $col_name = $info->{COLUMN_NAME}; |
218 | $col_name =~ s/^\"(.*)\"$/$1/; |
219 | |
220 | $result{$col_name} = \%column_info; |
221 | } |
222 | }; |
223 | return \%result if !$@ && scalar keys %result; |
224 | } |
225 | |
226 | if($self->db_schema) { |
227 | $table = $self->db_schema . $self->{_namesep} . $table; |
228 | } |
229 | my %result; |
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230 | my $sth = $dbh->prepare($self->schema->storage->sql_maker->select($table, undef, \'1 = 0')); |
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231 | $sth->execute; |
232 | my @columns = @{$sth->{NAME_lc}}; |
233 | for my $i ( 0 .. $#columns ){ |
234 | my %column_info; |
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235 | $column_info{data_type} = $sth->{TYPE}->[$i]; |
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236 | $column_info{size} = $sth->{PRECISION}->[$i]; |
237 | $column_info{is_nullable} = $sth->{NULLABLE}->[$i] ? 1 : 0; |
238 | |
239 | if ($column_info{data_type} =~ m/^(.*?)\((.*?)\)$/) { |
240 | $column_info{data_type} = $1; |
241 | $column_info{size} = $2; |
242 | } |
243 | |
244 | $result{$columns[$i]} = \%column_info; |
245 | } |
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246 | $sth->finish; |
247 | |
248 | foreach my $col (keys %result) { |
249 | my $colinfo = $result{$col}; |
250 | my $type_num = $colinfo->{data_type}; |
251 | my $type_name; |
252 | if(defined $type_num && $dbh->can('type_info')) { |
253 | my $type_info = $dbh->type_info($type_num); |
254 | $type_name = $type_info->{TYPE_NAME} if $type_info; |
255 | $colinfo->{data_type} = $type_name if $type_name; |
256 | } |
257 | } |
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258 | |
259 | return \%result; |
260 | } |
261 | |
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262 | =head1 SEE ALSO |
263 | |
264 | L<DBIx::Class::Schema::Loader> |
265 | |
266 | =cut |
267 | |
268 | 1; |