1package DBIx::Class::Schema::Loader::DBI; 2 3use strict; 4use warnings; 5use base qw/DBIx::Class::Schema::Loader::Base/; 6use Class::C3; 7use Carp::Clan qw/^DBIx::Class/; 8 9our $VERSION = '0.05003'; 10 11=head1 NAME 12 13DBIx::Class::Schema::Loader::DBI - DBIx::Class::Schema::Loader DBI Implementation. 14 15=head1 SYNOPSIS 16 17See L<DBIx::Class::Schema::Loader::Base> 18 19=head1 DESCRIPTION 20 21This is the base class for L<DBIx::Class::Schema::Loader::Base> classes for 22DBI-based storage backends, and implements the common functionality between them. 23 24See L<DBIx::Class::Schema::Loader::Base> for the available options. 25 26=head1 METHODS 27 28=head2 new 29 30Overlays L<DBIx::Class::Schema::Loader::Base/new> to do some DBI-specific 31things. 32 33=cut 34 35sub 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}; 41 42 my $subclass = 'DBIx::Class::Schema::Loader::DBI::' . $driver; 43 if ($self->load_optional_class($subclass)) { 44 bless $self, $subclass unless $self->isa($subclass); 45 $self->_rebless; 46 } 47 48 # Set up the default quoting character and name seperators 49 $self->{_quoter} = $self->_build_quoter; 50 $self->{_namesep} = $self->_build_namesep; 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 62sub _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 70sub _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 78# Override this in vendor modules to do things at the end of ->new() 79sub _setup { } 80 81# Override this in vendor module to load a subclass if necessary 82sub _rebless { } 83 84# Returns an array of table names 85sub _tables_list { 86 my $self = shift; 87 88 my ($table, $type) = @_ ? @_ : ('%', '%'); 89 90 my $dbh = $self->schema->storage->dbh; 91 my @tables = $dbh->tables(undef, $self->db_schema, $table, $type); 92 93 my $qt = qr/[\Q$self->{_quoter}\E"'`\[\]]/; 94 95 my $all_tables_quoted = (grep /$qt/, @tables) == @tables; 96 97 if ($self->{_quoter} && $all_tables_quoted) { 98 s/.* $qt (?= .* $qt)//xg for @tables; 99 } else { 100 s/^.*\Q$self->{_namesep}\E// for @tables; 101 } 102 s/$qt//g for @tables; 103 104 return $self->_filter_tables(@tables); 105} 106 107# ignore bad tables and views 108sub _filter_tables { 109 my ($self, @tables) = @_; 110 111 my @filtered_tables; 112 113 for my $table (@tables) { 114 eval { 115 my $sth = $self->_sth_for($table, undef, \'1 = 0'); 116 $sth->execute; 117 }; 118 if (not $@) { 119 push @filtered_tables, $table; 120 } 121 else { 122 warn "Bad table or view '$table', ignoring: $@\n"; 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 }; 131 } 132 } 133 134 return @filtered_tables; 135} 136 137=head2 load 138 139We override L<DBIx::Class::Schema::Loader::Base/load> here to hook in our localized settings for C<$dbh> error handling. 140 141=cut 142 143sub load { 144 my $self = shift; 145 146 local $self->schema->storage->dbh->{RaiseError} = 1; 147 local $self->schema->storage->dbh->{PrintError} = 0; 148 $self->next::method(@_); 149} 150 151sub _table_as_sql { 152 my ($self, $table) = @_; 153 154 if($self->{db_schema}) { 155 $table = $self->{db_schema} . $self->{_namesep} . 156 $self->_quote_table_name($table); 157 } else { 158 $table = $self->_quote_table_name($table); 159 } 160 161 return $table; 162} 163 164sub _sth_for { 165 my ($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 $sth; 173} 174 175# Returns an arrayref of column names 176sub _table_columns { 177 my ($self, $table) = @_; 178 179 my $sth = $self->_sth_for($table, undef, \'1 = 0'); 180 $sth->execute; 181 my $retval = \@{$sth->{NAME_lc}}; 182 $sth->finish; 183 184 $retval; 185} 186 187# Returns arrayref of pk col names 188sub _table_pk_info { 189 my ($self, $table) = @_; 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} 198 199# Override this for vendor-specific uniq info 200sub _table_uniq_info { 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 } 222 $sth->finish; 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 %$index 230 ]]); 231 } 232 233 return \@retval; 234} 235 236# Find relationships 237sub _table_fk_info { 238 my ($self, $table) = @_; 239 240 my $dbh = $self->schema->storage->dbh; 241 my $sth = $dbh->foreign_key_info( '', $self->db_schema, '', 242 '', $self->db_schema, $table ); 243 return [] if !$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 } 260 $sth->finish; 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} 273 274# ported in from DBIx::Class::Storage::DBI: 275sub _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, '%' ); 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/; 292 293 my $extra_info = $self->_extra_column_info($info) || {}; 294 $column_info = { %$column_info, %$extra_info }; 295 296 $result{$col_name} = $column_info; 297 } 298 $sth->finish; 299 }; 300 return \%result if !$@ && scalar keys %result; 301 } 302 303 my %result; 304 my $sth = $self->_sth_for($table, undef, \'1 = 0'); 305 $sth->execute; 306 my @columns = @{$sth->{NAME_lc}}; 307 for my $i ( 0 .. $#columns ){ 308 my $column_info = {}; 309 $column_info->{data_type} = $sth->{TYPE}->[$i]; 310 $column_info->{size} = $sth->{PRECISION}->[$i]; 311 $column_info->{is_nullable} = $sth->{NULLABLE}->[$i] ? 1 : 0; 312 313 if ($column_info->{data_type} =~ m/^(.*?)\((.*?)\)$/) { 314 $column_info->{data_type} = $1; 315 $column_info->{size} = $2; 316 } 317 318 my $extra_info = $self->_extra_column_info($table, $columns[$i], $sth, $i) || {}; 319 $column_info = { %$column_info, %$extra_info }; 320 321 $result{$columns[$i]} = $column_info; 322 } 323 $sth->finish; 324 325 foreach my $col (keys %result) { 326 my $colinfo = $result{$col}; 327 my $type_num = $colinfo->{data_type}; 328 my $type_name; 329 if(defined $type_num && $dbh->can('type_info')) { 330 my $type_info = $dbh->type_info($type_num); 331 $type_name = $type_info->{TYPE_NAME} if $type_info; 332 $colinfo->{data_type} = $type_name if $type_name; 333 } 334 } 335 336 return \%result; 337} 338 339# Override this in vendor class to return any additional column 340# attributes 341sub _extra_column_info {} 342 343=head1 SEE ALSO 344 345L<DBIx::Class::Schema::Loader> 346 347=head1 AUTHOR 348 349See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>. 350 351=head1 LICENSE 352 353This library is free software; you can redistribute it and/or modify it under 354the same terms as Perl itself. 355 356=cut 357 3581; 359