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 'first'; 9use List::MoreUtils 'any'; 10use Try::Tiny; 11use Scalar::Util 'blessed'; 12use namespace::clean; 13use DBIx::Class::Schema::Loader::Table (); 14 15our $VERSION = '0.07033'; 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 _tables_list { 69 my ($self, $opts) = @_; 70 71 return $self->next::method($opts, undef, undef); 72} 73 74sub _table_fk_info { 75 my ($self, $table) = @_; 76 77 my $table_def_ref = eval { $self->dbh->selectrow_arrayref("SHOW CREATE TABLE ".$table->sql_name) }; 78 my $table_def = $table_def_ref->[1]; 79 80 return [] if not $table_def; 81 82 my $qt = qr/["`]/; 83 my $nqt = qr/[^"`]/; 84 85 my (@reldata) = ($table_def =~ 86 /CONSTRAINT ${qt}${nqt}+${qt} FOREIGN KEY \($qt(.*)$qt\) REFERENCES (?:$qt($nqt+)$qt\.)?$qt($nqt+)$qt \($qt(.+)$qt\)\s*(.*)/ig 87 ); 88 89 my @rels; 90 while (scalar @reldata > 0) { 91 my ($cols, $f_schema, $f_table, $f_cols, $rest) = splice @reldata, 0, 5; 92 93 my @cols = map { s/$qt//g; $self->_lc($_) } 94 split(/$qt?\s*$qt?,$qt?\s*$qt?/, $cols); 95 96 my @f_cols = map { s/$qt//g; $self->_lc($_) } 97 split(/$qt?\s*$qt?,$qt?\s*$qt?/, $f_cols); 98 99 # Match case of remote schema to that in SHOW DATABASES, if it's there 100 # and we have permissions to run SHOW DATABASES. 101 if ($f_schema) { 102 my $matched = first { 103 lc($_) eq lc($f_schema) 104 } try { $self->_show_databases }; 105 106 $f_schema = $matched if $matched; 107 } 108 109 my $remote_table = do { 110 # Get ->tables_list to return tables from the remote schema, in case it is not in the db_schema list. 111 local $self->{db_schema} = [ $f_schema ] if $f_schema; 112 113 first { 114 lc($_->name) eq lc($f_table) 115 && ((not $f_schema) || lc($_->schema) eq lc($f_schema)) 116 } $self->_tables_list; 117 }; 118 119 # The table may not be in any database, or it may not have been found by the previous code block for whatever reason. 120 if (not $remote_table) { 121 my $remote_schema = $f_schema || $self->db_schema && @{ $self->db_schema } == 1 && $self->db_schema->[0]; 122 123 $remote_table = DBIx::Class::Schema::Loader::Table->new( 124 loader => $self, 125 name => $f_table, 126 ($remote_schema ? ( 127 schema => $remote_schema, 128 ) : ()), 129 ); 130 } 131 132 my %attrs; 133 134 if ($rest) { 135 my @on_clauses = $rest =~ /(ON DELETE|ON UPDATE) (RESTRICT|CASCADE|SET NULL|NO ACTION) ?/ig; 136 137 while (my ($clause, $value) = splice @on_clauses, 0, 2) { 138 $clause = lc $clause; 139 $clause =~ s/ /_/; 140 141 $value = uc $value; 142 143 $attrs{$clause} = $value; 144 } 145 } 146 147# The default behavior is RESTRICT. Specifying RESTRICT explicitly just removes 148# that ON clause from the SHOW CREATE TABLE output. For this reason, even 149# though the default for these clauses everywhere else in Schema::Loader is 150# CASCADE, we change the default here to RESTRICT in order to reproduce the 151# schema faithfully. 152 $attrs{on_delete} ||= 'RESTRICT'; 153 $attrs{on_update} ||= 'RESTRICT'; 154 155# MySQL does not have a DEFERRABLE attribute, but there is a way to defer FKs. 156 $attrs{is_deferrable} = 1; 157 158 push(@rels, { 159 local_columns => \@cols, 160 remote_columns => \@f_cols, 161 remote_table => $remote_table, 162 attrs => \%attrs, 163 }); 164 } 165 166 return \@rels; 167} 168 169# primary and unique info comes from the same sql statement, 170# so cache it here for both routines to use 171sub _mysql_table_get_keys { 172 my ($self, $table) = @_; 173 174 if(!exists($self->{_cache}->{_mysql_keys}->{$table->sql_name})) { 175 my %keydata; 176 my $sth = $self->dbh->prepare('SHOW INDEX FROM '.$table->sql_name); 177 $sth->execute; 178 while(my $row = $sth->fetchrow_hashref) { 179 next if $row->{Non_unique}; 180 push(@{$keydata{$row->{Key_name}}}, 181 [ $row->{Seq_in_index}, $self->_lc($row->{Column_name}) ] 182 ); 183 } 184 foreach my $keyname (keys %keydata) { 185 my @ordered_cols = map { $_->[1] } sort { $a->[0] <=> $b->[0] } 186 @{$keydata{$keyname}}; 187 $keydata{$keyname} = \@ordered_cols; 188 } 189 $self->{_cache}->{_mysql_keys}->{$table->sql_name} = \%keydata; 190 } 191 192 return $self->{_cache}->{_mysql_keys}->{$table->sql_name}; 193} 194 195sub _table_pk_info { 196 my ( $self, $table ) = @_; 197 198 return $self->_mysql_table_get_keys($table)->{PRIMARY}; 199} 200 201sub _table_uniq_info { 202 my ( $self, $table ) = @_; 203 204 my @uniqs; 205 my $keydata = $self->_mysql_table_get_keys($table); 206 foreach my $keyname (keys %$keydata) { 207 next if $keyname eq 'PRIMARY'; 208 push(@uniqs, [ $keyname => $keydata->{$keyname} ]); 209 } 210 211 return \@uniqs; 212} 213 214sub _columns_info_for { 215 my $self = shift; 216 my ($table) = @_; 217 218 my $result = $self->next::method(@_); 219 220 while (my ($col, $info) = each %$result) { 221 if ($info->{data_type} eq 'int') { 222 $info->{data_type} = 'integer'; 223 } 224 elsif ($info->{data_type} eq 'double') { 225 $info->{data_type} = 'double precision'; 226 } 227 my $data_type = $info->{data_type}; 228 229 delete $info->{size} if $data_type !~ /^(?: (?:var)?(?:char(?:acter)?|binary) | bit | year)\z/ix; 230 231 # information_schema is available in 5.0+ 232 my ($precision, $scale, $column_type, $default) = eval { $self->dbh->selectrow_array(<<'EOF', {}, $table->name, lc($col)) }; 233SELECT numeric_precision, numeric_scale, column_type, column_default 234FROM information_schema.columns 235WHERE table_name = ? AND lower(column_name) = ? 236EOF 237 my $has_information_schema = not $@; 238 239 $column_type = '' if not defined $column_type; 240 241 if ($data_type eq 'bit' && (not exists $info->{size})) { 242 $info->{size} = $precision if defined $precision; 243 } 244 elsif ($data_type =~ /^(?:float|double precision|decimal)\z/i) { 245 if (defined $precision && defined $scale) { 246 if ($precision == 10 && $scale == 0) { 247 delete $info->{size}; 248 } 249 else { 250 $info->{size} = [$precision,$scale]; 251 } 252 } 253 } 254 elsif ($data_type eq 'year') { 255 if ($column_type =~ /\(2\)/) { 256 $info->{size} = 2; 257 } 258 elsif ($column_type =~ /\(4\)/ || $info->{size} == 4) { 259 delete $info->{size}; 260 } 261 } 262 elsif ($data_type =~ /^(?:date(?:time)?|timestamp)\z/) { 263 if (not (defined $self->datetime_undef_if_invalid && $self->datetime_undef_if_invalid == 0)) { 264 $info->{datetime_undef_if_invalid} = 1; 265 } 266 } 267 elsif ($data_type =~ /^(?:enum|set)\z/ && $has_information_schema 268 && $column_type =~ /^(?:enum|set)\(/) { 269 270 delete $info->{extra}{list}; 271 272 while ($column_type =~ /'((?:[^']* (?:''|\\')* [^']*)* [^\\'])',?/xg) { 273 my $el = $1; 274 $el =~ s/''/'/g; 275 push @{ $info->{extra}{list} }, $el; 276 } 277 } 278 279 # Sometimes apparently there's a bug where default_value gets set to '' 280 # for things that don't actually have or support that default (like ints.) 281 if (exists $info->{default_value} && $info->{default_value} eq '') { 282 if ($has_information_schema) { 283 if (not defined $default) { 284 delete $info->{default_value}; 285 } 286 } 287 else { # just check if it's a char/text type, otherwise remove 288 delete $info->{default_value} unless $data_type =~ /char|text/i; 289 } 290 } 291 } 292 293 return $result; 294} 295 296sub _extra_column_info { 297 no warnings 'uninitialized'; 298 my ($self, $table, $col, $info, $dbi_info) = @_; 299 my %extra_info; 300 301 if ($dbi_info->{mysql_is_auto_increment}) { 302 $extra_info{is_auto_increment} = 1 303 } 304 if ($dbi_info->{mysql_type_name} =~ /\bunsigned\b/i) { 305 $extra_info{extra}{unsigned} = 1; 306 } 307 if ($dbi_info->{mysql_values}) { 308 $extra_info{extra}{list} = $dbi_info->{mysql_values}; 309 } 310 if ((not blessed $dbi_info) # isa $sth 311 && lc($dbi_info->{COLUMN_DEF}) eq 'current_timestamp' 312 && lc($dbi_info->{mysql_type_name}) eq 'timestamp') { 313 314 my $current_timestamp = 'current_timestamp'; 315 $extra_info{default_value} = \$current_timestamp; 316 } 317 318 return \%extra_info; 319} 320 321sub _dbh_column_info { 322 my $self = shift; 323 324 local $SIG{__WARN__} = sub { warn @_ 325 unless $_[0] =~ /^column_info: unrecognized column type/ }; 326 327 $self->next::method(@_); 328} 329 330sub _table_comment { 331 my ( $self, $table ) = @_; 332 my $comment = $self->next::method($table); 333 if (not $comment) { 334 ($comment) = try { $self->schema->storage->dbh->selectrow_array( 335 qq{SELECT table_comment 336 FROM information_schema.tables 337 WHERE table_schema = schema() 338 AND table_name = ? 339 }, undef, $table->name); 340 }; 341 # InnoDB likes to auto-append crap. 342 if (not $comment) { 343 # Do nothing. 344 } 345 elsif ($comment =~ /^InnoDB free:/) { 346 $comment = undef; 347 } 348 else { 349 $comment =~ s/; InnoDB.*//; 350 } 351 } 352 return $comment; 353} 354 355sub _column_comment { 356 my ( $self, $table, $column_number, $column_name ) = @_; 357 my $comment = $self->next::method($table, $column_number, $column_name); 358 if (not $comment) { 359 ($comment) = try { $self->schema->storage->dbh->selectrow_array( 360 qq{SELECT column_comment 361 FROM information_schema.columns 362 WHERE table_schema = schema() 363 AND table_name = ? 364 AND lower(column_name) = ? 365 }, undef, $table->name, lc($column_name)); 366 }; 367 } 368 return $comment; 369} 370 371=head1 SEE ALSO 372 373L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>, 374L<DBIx::Class::Schema::Loader::DBI> 375 376=head1 AUTHOR 377 378See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>. 379 380=head1 LICENSE 381 382This library is free software; you can redistribute it and/or modify it under 383the same terms as Perl itself. 384 385=cut 386 3871; 388# vim:et sw=4 sts=4 tw=0: 389