1package DBIx::Class::Schema::Loader::DBI::mysql; 2 3use strict; 4use warnings; 5use base 'DBIx::Class::Schema::Loader::DBI'; 6use mro 'c3'; 7use Carp::Clan qw/^DBIx::Class/; 8use List::Util qw/any first/; 9use Try::Tiny; 10use Scalar::Util 'blessed'; 11use DBIx::Class::Schema::Loader::Utils qw/sigwarn_silencer/; 12use namespace::clean; 13use DBIx::Class::Schema::Loader::Table (); 14 15our $VERSION = '0.07049'; 16 17=head1 NAME 18 19DBIx::Class::Schema::Loader::DBI::mysql - DBIx::Class::Schema::Loader::DBI mysql Implementation. 20 21=head1 DESCRIPTION 22 23See L<DBIx::Class::Schema::Loader> and L<DBIx::Class::Schema::Loader::Base>. 24 25=cut 26 27sub _setup { 28 my $self = shift; 29 30 $self->schema->storage->sql_maker->quote_char("`"); 31 $self->schema->storage->sql_maker->name_sep("."); 32 33 $self->next::method(@_); 34 35 if (not defined $self->preserve_case) { 36 $self->preserve_case(0); 37 } 38 39 if ($self->db_schema && $self->db_schema->[0] eq '%') { 40 my @schemas = try { 41 $self->_show_databases; 42 } 43 catch { 44 croak "no SHOW DATABASES privileges: $_"; 45 }; 46 47 @schemas = grep { 48 my $schema = $_; 49 not any { lc($schema) eq lc($_) } $self->_system_schemas 50 } @schemas; 51 52 $self->db_schema(\@schemas); 53 } 54} 55 56sub _show_databases { 57 my $self = shift; 58 59 return map $_->[0], @{ $self->dbh->selectall_arrayref('SHOW DATABASES') }; 60} 61 62sub _system_schemas { 63 my $self = shift; 64 65 return ($self->next::method(@_), 'mysql'); 66} 67 68sub _table_fk_info { 69 my ($self, $table) = @_; 70 71 my $table_def_ref = eval { $self->dbh->selectrow_arrayref("SHOW CREATE TABLE ".$table->sql_name) }; 72 my $table_def = $table_def_ref->[1]; 73 74 return [] if not $table_def; 75 76 my $qt = qr/["`]/; 77 my $nqt = qr/[^"`]/; 78 79 my (@reldata) = ($table_def =~ 80 /CONSTRAINT ${qt}${nqt}+${qt} FOREIGN KEY \($qt(.*)$qt\) REFERENCES (?:$qt($nqt+)$qt\.)?$qt($nqt+)$qt \($qt(.+)$qt\)\s*(.*)/ig 81 ); 82 83 my @rels; 84 while (scalar @reldata > 0) { 85 my ($cols, $f_schema, $f_table, $f_cols, $rest) = splice @reldata, 0, 5; 86 87 my @cols = map { s/$qt//g; $self->_lc($_) } 88 split(/$qt?\s*$qt?,$qt?\s*$qt?/, $cols); 89 90 my @f_cols = map { s/$qt//g; $self->_lc($_) } 91 split(/$qt?\s*$qt?,$qt?\s*$qt?/, $f_cols); 92 93 # Match case of remote schema to that in SHOW DATABASES, if it's there 94 # and we have permissions to run SHOW DATABASES. 95 if ($f_schema) { 96 my $matched = first { 97 lc($_) eq lc($f_schema) 98 } try { $self->_show_databases }; 99 100 $f_schema = $matched if $matched; 101 } 102 103 my $remote_table = do { 104 # Get ->tables_list to return tables from the remote schema, in case it is not in the db_schema list. 105 local $self->{db_schema} = [ $f_schema ] if $f_schema; 106 107 first { 108 lc($_->name) eq lc($f_table) 109 && ((not $f_schema) || lc($_->schema) eq lc($f_schema)) 110 } $self->_tables_list; 111 }; 112 113 # The table may not be in any database, or it may not have been found by the previous code block for whatever reason. 114 if (not $remote_table) { 115 my $remote_schema = $f_schema || $self->db_schema && @{ $self->db_schema } == 1 && $self->db_schema->[0]; 116 117 $remote_table = DBIx::Class::Schema::Loader::Table->new( 118 loader => $self, 119 name => $f_table, 120 ($remote_schema ? ( 121 schema => $remote_schema, 122 ) : ()), 123 ); 124 } 125 126 my %attrs; 127 128 if ($rest) { 129 my @on_clauses = $rest =~ /(ON DELETE|ON UPDATE) (RESTRICT|CASCADE|SET NULL|NO ACTION) ?/ig; 130 131 while (my ($clause, $value) = splice @on_clauses, 0, 2) { 132 $clause = lc $clause; 133 $clause =~ s/ /_/; 134 135 $value = uc $value; 136 137 $attrs{$clause} = $value; 138 } 139 } 140 141# The default behavior is RESTRICT. Specifying RESTRICT explicitly just removes 142# that ON clause from the SHOW CREATE TABLE output. For this reason, even 143# though the default for these clauses everywhere else in Schema::Loader is 144# CASCADE, we change the default here to RESTRICT in order to reproduce the 145# schema faithfully. 146 $attrs{on_delete} ||= 'RESTRICT'; 147 $attrs{on_update} ||= 'RESTRICT'; 148 149# MySQL does not have a DEFERRABLE attribute, but there is a way to defer FKs. 150 $attrs{is_deferrable} = 1; 151 152 push(@rels, { 153 local_columns => \@cols, 154 remote_columns => \@f_cols, 155 remote_table => $remote_table, 156 attrs => \%attrs, 157 }); 158 } 159 160 return \@rels; 161} 162 163# primary and unique info comes from the same sql statement, 164# so cache it here for both routines to use 165sub _mysql_table_get_keys { 166 my ($self, $table) = @_; 167 168 if(!exists($self->{_cache}->{_mysql_keys}->{$table->sql_name})) { 169 my %keydata; 170 my $sth = $self->dbh->prepare('SHOW INDEX FROM '.$table->sql_name); 171 $sth->execute; 172 while(my $row = $sth->fetchrow_hashref) { 173 next if $row->{Non_unique}; 174 push(@{$keydata{$row->{Key_name}}}, 175 [ $row->{Seq_in_index}, $self->_lc($row->{Column_name}) ] 176 ); 177 } 178 foreach my $keyname (keys %keydata) { 179 my @ordered_cols = map { $_->[1] } sort { $a->[0] <=> $b->[0] } 180 @{$keydata{$keyname}}; 181 $keydata{$keyname} = \@ordered_cols; 182 } 183 $self->{_cache}->{_mysql_keys}->{$table->sql_name} = \%keydata; 184 } 185 186 return $self->{_cache}->{_mysql_keys}->{$table->sql_name}; 187} 188 189sub _table_pk_info { 190 my ( $self, $table ) = @_; 191 192 return $self->_mysql_table_get_keys($table)->{PRIMARY}; 193} 194 195sub _table_uniq_info { 196 my ( $self, $table ) = @_; 197 198 my @uniqs; 199 my $keydata = $self->_mysql_table_get_keys($table); 200 foreach my $keyname (sort keys %$keydata) { 201 next if $keyname eq 'PRIMARY'; 202 push(@uniqs, [ $keyname => $keydata->{$keyname} ]); 203 } 204 205 return \@uniqs; 206} 207 208sub _columns_info_for { 209 my $self = shift; 210 my ($table) = @_; 211 212 my $result = $self->next::method(@_); 213 214 while (my ($col, $info) = each %$result) { 215 if ($info->{data_type} eq 'int') { 216 $info->{data_type} = 'integer'; 217 } 218 elsif ($info->{data_type} eq 'double') { 219 $info->{data_type} = 'double precision'; 220 } 221 my $data_type = $info->{data_type}; 222 223 delete $info->{size} if $data_type !~ /^(?: (?:var)?(?:char(?:acter)?|binary) | bit | year)\z/ix; 224 225 # information_schema is available in 5.0+ 226 my ($precision, $scale, $column_type, $default) = eval { $self->dbh->selectrow_array(<<'EOF', {}, $table->name, lc($col)) }; 227SELECT numeric_precision, numeric_scale, column_type, column_default 228FROM information_schema.columns 229WHERE table_schema = schema() AND table_name = ? AND lower(column_name) = ? 230EOF 231 my $has_information_schema = not $@; 232 233 $column_type = '' if not defined $column_type; 234 235 if ($data_type eq 'bit' && (not exists $info->{size})) { 236 $info->{size} = $precision if defined $precision; 237 } 238 elsif ($data_type =~ /^(?:float|double precision|decimal)\z/i) { 239 if (defined $precision && defined $scale) { 240 if ($precision == 10 && $scale == 0) { 241 delete $info->{size}; 242 } 243 else { 244 $info->{size} = [$precision,$scale]; 245 } 246 } 247 } 248 elsif ($data_type eq 'year') { 249 if ($column_type =~ /\(2\)/) { 250 $info->{size} = 2; 251 } 252 elsif ($column_type =~ /\(4\)/ || $info->{size} == 4) { 253 delete $info->{size}; 254 } 255 } 256 elsif ($data_type =~ /^(?:date(?:time)?|timestamp)\z/) { 257 if (not (defined $self->datetime_undef_if_invalid && $self->datetime_undef_if_invalid == 0)) { 258 $info->{datetime_undef_if_invalid} = 1; 259 } 260 } 261 elsif ($data_type =~ /^(?:enum|set)\z/ && $has_information_schema 262 && $column_type =~ /^(?:enum|set)\(/) { 263 264 delete $info->{extra}{list}; 265 266 while ($column_type =~ /'((?:[^']* (?:''|\\')* [^']*)* [^\\']?)',?/xg) { 267 my $el = $1; 268 $el =~ s/''/'/g; 269 push @{ $info->{extra}{list} }, $el; 270 } 271 } 272 273 # Sometimes apparently there's a bug where default_value gets set to '' 274 # for things that don't actually have or support that default (like ints.) 275 if (exists $info->{default_value} && $info->{default_value} eq '') { 276 if ($has_information_schema) { 277 if (not defined $default) { 278 delete $info->{default_value}; 279 } 280 } 281 else { # just check if it's a char/text type, otherwise remove 282 delete $info->{default_value} unless $data_type =~ /char|text/i; 283 } 284 } 285 } 286 287 return $result; 288} 289 290sub _extra_column_info { 291 no warnings 'uninitialized'; 292 my ($self, $table, $col, $info, $dbi_info) = @_; 293 my %extra_info; 294 295 if ($dbi_info->{mysql_is_auto_increment}) { 296 $extra_info{is_auto_increment} = 1 297 } 298 if ($dbi_info->{mysql_type_name} =~ /\bunsigned\b/i) { 299 $extra_info{extra}{unsigned} = 1; 300 } 301 if ($dbi_info->{mysql_values}) { 302 $extra_info{extra}{list} = $dbi_info->{mysql_values}; 303 } 304 if ((not blessed $dbi_info) # isa $sth 305 && lc($dbi_info->{COLUMN_DEF}) eq 'current_timestamp' 306 && lc($dbi_info->{mysql_type_name}) eq 'timestamp') { 307 308 my $current_timestamp = 'current_timestamp'; 309 $extra_info{default_value} = \$current_timestamp; 310 } 311 312 return \%extra_info; 313} 314 315sub _dbh_column_info { 316 my $self = shift; 317 318 local $SIG{__WARN__} = sigwarn_silencer( 319 qr/^column_info: unrecognized column type/ 320 ); 321 322 $self->next::method(@_); 323} 324 325sub _table_comment { 326 my ( $self, $table ) = @_; 327 my $comment = $self->next::method($table); 328 if (not $comment) { 329 ($comment) = try { $self->schema->storage->dbh->selectrow_array( 330 qq{SELECT table_comment 331 FROM information_schema.tables 332 WHERE table_schema = schema() 333 AND table_name = ? 334 }, undef, $table->name); 335 }; 336 # InnoDB likes to auto-append crap. 337 if (not $comment) { 338 # Do nothing. 339 } 340 elsif ($comment =~ /^InnoDB free:/) { 341 $comment = undef; 342 } 343 else { 344 $comment =~ s/; InnoDB.*//; 345 } 346 } 347 return $comment; 348} 349 350sub _column_comment { 351 my ( $self, $table, $column_number, $column_name ) = @_; 352 my $comment = $self->next::method($table, $column_number, $column_name); 353 if (not $comment) { 354 ($comment) = try { $self->schema->storage->dbh->selectrow_array( 355 qq{SELECT column_comment 356 FROM information_schema.columns 357 WHERE table_schema = schema() 358 AND table_name = ? 359 AND lower(column_name) = ? 360 }, undef, $table->name, lc($column_name)); 361 }; 362 } 363 return $comment; 364} 365 366sub _view_definition { 367 my ($self, $view) = @_; 368 369 return scalar $self->schema->storage->dbh->selectrow_array( 370 q{SELECT view_definition 371 FROM information_schema.views 372 WHERE table_schema = schema() 373 AND table_name = ? 374 }, undef, $view->name, 375 ); 376} 377 378=head1 SEE ALSO 379 380L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>, 381L<DBIx::Class::Schema::Loader::DBI> 382 383=head1 AUTHORS 384 385See L<DBIx::Class::Schema::Loader/AUTHORS>. 386 387=head1 LICENSE 388 389This library is free software; you can redistribute it and/or modify it under 390the same terms as Perl itself. 391 392=cut 393 3941; 395# vim:et sw=4 sts=4 tw=0: 396