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1 | package DBIx::Class::Schema::Loader::DBI; |
2 | |
3 | use strict; |
4 | use warnings; |
abaf2c66 |
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 | |
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9 | our $VERSION = '0.05002'; |
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10 | |
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11 | =head1 NAME |
12 | |
13 | DBIx::Class::Schema::Loader::DBI - DBIx::Class::Schema::Loader DBI Implementation. |
14 | |
15 | =head1 SYNOPSIS |
16 | |
17 | See L<DBIx::Class::Schema::Loader::Base> |
18 | |
19 | =head1 DESCRIPTION |
20 | |
21 | This is the base class for L<DBIx::Class::Schema::Loader::Base> classes for |
22 | DBI-based storage backends, and implements the common functionality between them. |
23 | |
24 | See L<DBIx::Class::Schema::Loader::Base> for the available options. |
25 | |
26 | =head1 METHODS |
27 | |
28 | =head2 new |
29 | |
30 | Overlays L<DBIx::Class::Schema::Loader::Base/new> to do some DBI-specific |
31 | things. |
32 | |
33 | =cut |
34 | |
35 | sub new { |
36 | my $self = shift->next::method(@_); |
37 | |
38 | # rebless to vendor-specific class if it exists and loads |
39 | my $dbh = $self->schema->storage->dbh; |
40 | my $driver = $dbh->{Driver}->{Name}; |
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41 | |
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42 | my $subclass = 'DBIx::Class::Schema::Loader::DBI::' . $driver; |
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43 | if ($self->load_optional_class($subclass)) { |
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44 | bless $self, $subclass unless $self->isa($subclass); |
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45 | $self->_rebless; |
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46 | } |
47 | |
48 | # Set up the default quoting character and name seperators |
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49 | $self->{_quoter} = $self->_build_quoter; |
50 | $self->{_namesep} = $self->_build_namesep; |
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51 | # For our usage as regex matches, concatenating multiple quoter |
52 | # values works fine (e.g. s/\Q<>\E// if quoter was [ '<', '>' ]) |
53 | if( ref $self->{_quoter} eq 'ARRAY') { |
54 | $self->{_quoter} = join(q{}, @{$self->{_quoter}}); |
55 | } |
56 | |
57 | $self->_setup; |
58 | |
59 | $self; |
60 | } |
61 | |
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62 | sub _build_quoter { |
63 | my $self = shift; |
64 | my $dbh = $self->schema->storage->dbh; |
65 | return $dbh->get_info(29) |
66 | || $self->schema->storage->sql_maker->quote_char |
67 | || q{"}; |
68 | } |
69 | |
70 | sub _build_namesep { |
71 | my $self = shift; |
72 | my $dbh = $self->schema->storage->dbh; |
73 | return $dbh->get_info(41) |
74 | || $self->schema->storage->sql_maker->name_sep |
75 | || q{.}; |
76 | } |
77 | |
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78 | # Override this in vendor modules to do things at the end of ->new() |
79 | sub _setup { } |
80 | |
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81 | # Override this in vendor module to load a subclass if necessary |
82 | sub _rebless { } |
83 | |
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84 | # Returns an array of table names |
85 | sub _tables_list { |
86 | my $self = shift; |
87 | |
e57fd726 |
88 | my ($table, $type) = @_ ? @_ : ('%', '%'); |
89 | |
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90 | my $dbh = $self->schema->storage->dbh; |
e57fd726 |
91 | my @tables = $dbh->tables(undef, $self->db_schema, $table, $type); |
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92 | |
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93 | my $qt = qr/[\Q$self->{_quoter}\E"'`\[\]]/; |
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94 | |
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95 | my $all_tables_quoted = (grep /$qt/, @tables) == @tables; |
96 | |
97 | if ($self->{_quoter} && $all_tables_quoted) { |
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98 | s/.* $qt (?= .* $qt)//xg for @tables; |
99 | } else { |
100 | s/^.*\Q$self->{_namesep}\E// for @tables; |
101 | } |
102 | s/$qt//g for @tables; |
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103 | |
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104 | return $self->_filter_tables(@tables); |
105 | } |
106 | |
107 | # ignore bad tables and views |
108 | sub _filter_tables { |
109 | my ($self, @tables) = @_; |
110 | |
111 | my @filtered_tables; |
112 | |
113 | for my $table (@tables) { |
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114 | eval { |
115 | my $sth = $self->_sth_for($table, undef, \'1 = 0'); |
116 | $sth->execute; |
117 | }; |
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118 | if (not $@) { |
119 | push @filtered_tables, $table; |
120 | } |
121 | else { |
122 | warn "Bad table or view '$table', ignoring: $@\n"; |
d073740e |
123 | local $@; |
124 | eval { |
125 | my $schema = $self->schema; |
126 | # in older DBIC it's a private method |
127 | my $unregister = $schema->can('unregister_source') |
128 | || $schema->can('_unregister_source'); |
129 | $schema->$unregister($self->_table2moniker($table)); |
130 | }; |
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131 | } |
132 | } |
133 | |
134 | return @filtered_tables; |
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135 | } |
136 | |
12af3806 |
137 | =head2 load |
138 | |
139 | We override L<DBIx::Class::Schema::Loader::Base/load> here to hook in our localized settings for C<$dbh> error handling. |
140 | |
141 | =cut |
142 | |
143 | sub load { |
144 | my $self = shift; |
145 | |
146 | local $self->schema->storage->dbh->{RaiseError} = 1; |
147 | local $self->schema->storage->dbh->{PrintError} = 0; |
148 | $self->next::method(@_); |
149 | } |
150 | |
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151 | sub _table_as_sql { |
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152 | my ($self, $table) = @_; |
153 | |
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154 | if($self->{db_schema}) { |
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155 | $table = $self->{db_schema} . $self->{_namesep} . |
156 | $self->_quote_table_name($table); |
157 | } else { |
158 | $table = $self->_quote_table_name($table); |
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159 | } |
160 | |
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161 | return $table; |
162 | } |
163 | |
164 | sub _sth_for { |
165 | my ($self, $table, $fields, $where) = @_; |
166 | |
167 | my $dbh = $self->schema->storage->dbh; |
168 | |
169 | my $sth = $dbh->prepare($self->schema->storage->sql_maker |
170 | ->select(\$self->_table_as_sql($table), $fields, $where)); |
171 | |
172 | return $sth; |
173 | } |
174 | |
175 | # Returns an arrayref of column names |
176 | sub _table_columns { |
177 | my ($self, $table) = @_; |
178 | |
179 | my $sth = $self->_sth_for($table, undef, \'1 = 0'); |
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180 | $sth->execute; |
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181 | my $retval = \@{$sth->{NAME_lc}}; |
182 | $sth->finish; |
183 | |
184 | $retval; |
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185 | } |
186 | |
187 | # Returns arrayref of pk col names |
188 | sub _table_pk_info { |
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189 | my ($self, $table) = @_; |
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190 | |
191 | my $dbh = $self->schema->storage->dbh; |
192 | |
193 | my @primary = map { lc } $dbh->primary_key('', $self->db_schema, $table); |
194 | s/\Q$self->{_quoter}\E//g for @primary; |
195 | |
196 | return \@primary; |
197 | } |
198 | |
fd589700 |
199 | # Override this for vendor-specific uniq info |
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200 | sub _table_uniq_info { |
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201 | my ($self, $table) = @_; |
202 | |
203 | my $dbh = $self->schema->storage->dbh; |
204 | if(!$dbh->can('statistics_info')) { |
205 | warn "No UNIQUE constraint information can be gathered for this vendor"; |
206 | return []; |
207 | } |
208 | |
209 | my %indices; |
210 | my $sth = $dbh->statistics_info(undef, $self->db_schema, $table, 1, 1); |
211 | while(my $row = $sth->fetchrow_hashref) { |
212 | # skip table-level stats, conditional indexes, and any index missing |
213 | # critical fields |
214 | next if $row->{TYPE} eq 'table' |
215 | || defined $row->{FILTER_CONDITION} |
216 | || !$row->{INDEX_NAME} |
217 | || !defined $row->{ORDINAL_POSITION} |
218 | || !$row->{COLUMN_NAME}; |
219 | |
220 | $indices{$row->{INDEX_NAME}}->{$row->{ORDINAL_POSITION}} = $row->{COLUMN_NAME}; |
221 | } |
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222 | $sth->finish; |
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223 | |
224 | my @retval; |
225 | foreach my $index_name (keys %indices) { |
226 | my $index = $indices{$index_name}; |
227 | push(@retval, [ $index_name => [ |
228 | map { $index->{$_} } |
229 | sort keys %$index |
230 | ]]); |
231 | } |
232 | |
233 | return \@retval; |
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234 | } |
235 | |
236 | # Find relationships |
237 | sub _table_fk_info { |
238 | my ($self, $table) = @_; |
239 | |
240 | my $dbh = $self->schema->storage->dbh; |
a168c1c4 |
241 | my $sth = $dbh->foreign_key_info( '', $self->db_schema, '', |
242 | '', $self->db_schema, $table ); |
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243 | return [] if !$sth; |
244 | |
245 | my %rels; |
246 | |
247 | my $i = 1; # for unnamed rels, which hopefully have only 1 column ... |
248 | while(my $raw_rel = $sth->fetchrow_arrayref) { |
249 | my $uk_tbl = $raw_rel->[2]; |
250 | my $uk_col = lc $raw_rel->[3]; |
251 | my $fk_col = lc $raw_rel->[7]; |
252 | my $relid = ($raw_rel->[11] || ( "__dcsld__" . $i++ )); |
253 | $uk_tbl =~ s/\Q$self->{_quoter}\E//g; |
254 | $uk_col =~ s/\Q$self->{_quoter}\E//g; |
255 | $fk_col =~ s/\Q$self->{_quoter}\E//g; |
256 | $relid =~ s/\Q$self->{_quoter}\E//g; |
257 | $rels{$relid}->{tbl} = $uk_tbl; |
258 | $rels{$relid}->{cols}->{$uk_col} = $fk_col; |
259 | } |
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260 | $sth->finish; |
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261 | |
262 | my @rels; |
263 | foreach my $relid (keys %rels) { |
264 | push(@rels, { |
265 | remote_columns => [ keys %{$rels{$relid}->{cols}} ], |
266 | local_columns => [ values %{$rels{$relid}->{cols}} ], |
267 | remote_table => $rels{$relid}->{tbl}, |
268 | }); |
269 | } |
270 | |
271 | return \@rels; |
272 | } |
273 | |
12af3806 |
274 | # ported in from DBIx::Class::Storage::DBI: |
275 | sub _columns_info_for { |
276 | my ($self, $table) = @_; |
277 | |
278 | my $dbh = $self->schema->storage->dbh; |
279 | |
280 | if ($dbh->can('column_info')) { |
281 | my %result; |
282 | eval { |
283 | my $sth = $dbh->column_info( undef, $self->db_schema, $table, '%' ); |
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284 | while ( my $info = $sth->fetchrow_hashref() ){ |
285 | my %column_info; |
286 | $column_info{data_type} = $info->{TYPE_NAME}; |
287 | $column_info{size} = $info->{COLUMN_SIZE}; |
288 | $column_info{is_nullable} = $info->{NULLABLE} ? 1 : 0; |
289 | $column_info{default_value} = $info->{COLUMN_DEF}; |
290 | my $col_name = $info->{COLUMN_NAME}; |
291 | $col_name =~ s/^\"(.*)\"$/$1/; |
292 | |
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293 | my $extra_info = $self->_extra_column_info($info) || {}; |
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294 | |
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295 | $result{$col_name} = { %column_info, %$extra_info }; |
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296 | } |
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297 | $sth->finish; |
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298 | }; |
299 | return \%result if !$@ && scalar keys %result; |
300 | } |
301 | |
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302 | my %result; |
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303 | my $sth = $self->_sth_for($table, undef, \'1 = 0'); |
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304 | $sth->execute; |
305 | my @columns = @{$sth->{NAME_lc}}; |
306 | for my $i ( 0 .. $#columns ){ |
307 | my %column_info; |
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308 | $column_info{data_type} = $sth->{TYPE}->[$i]; |
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309 | $column_info{size} = $sth->{PRECISION}->[$i]; |
310 | $column_info{is_nullable} = $sth->{NULLABLE}->[$i] ? 1 : 0; |
311 | |
312 | if ($column_info{data_type} =~ m/^(.*?)\((.*?)\)$/) { |
313 | $column_info{data_type} = $1; |
314 | $column_info{size} = $2; |
315 | } |
316 | |
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317 | my $extra_info = $self->_extra_column_info($table, $columns[$i], $sth, $i) || {}; |
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318 | |
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319 | $result{$columns[$i]} = { %column_info, %$extra_info }; |
12af3806 |
320 | } |
6ce0bcc3 |
321 | $sth->finish; |
322 | |
323 | foreach my $col (keys %result) { |
324 | my $colinfo = $result{$col}; |
325 | my $type_num = $colinfo->{data_type}; |
326 | my $type_name; |
327 | if(defined $type_num && $dbh->can('type_info')) { |
328 | my $type_info = $dbh->type_info($type_num); |
329 | $type_name = $type_info->{TYPE_NAME} if $type_info; |
330 | $colinfo->{data_type} = $type_name if $type_name; |
331 | } |
332 | } |
12af3806 |
333 | |
334 | return \%result; |
335 | } |
336 | |
a8df0345 |
337 | # Override this in vendor class to return any additional column |
338 | # attributes |
339 | sub _extra_column_info {} |
c5baf131 |
340 | |
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341 | =head1 SEE ALSO |
342 | |
343 | L<DBIx::Class::Schema::Loader> |
344 | |
be80bba7 |
345 | =head1 AUTHOR |
346 | |
9cc8e7e1 |
347 | See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>. |
be80bba7 |
348 | |
349 | =head1 LICENSE |
350 | |
351 | This library is free software; you can redistribute it and/or modify it under |
352 | the same terms as Perl itself. |
353 | |
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354 | =cut |
355 | |
356 | 1; |