1 package DBIx::Class::Schema::Loader::DBI::mysql;
5 use base 'DBIx::Class::Schema::Loader::DBI';
7 use Carp::Clan qw/^DBIx::Class/;
8 use List::Util 'first';
9 use List::MoreUtils 'any';
11 use Scalar::Util 'blessed';
12 use DBIx::Class::Schema::Loader::Utils qw/sigwarn_silencer/;
14 use DBIx::Class::Schema::Loader::Table ();
16 our $VERSION = '0.07042';
20 DBIx::Class::Schema::Loader::DBI::mysql - DBIx::Class::Schema::Loader::DBI mysql Implementation.
24 See L<DBIx::Class::Schema::Loader> and L<DBIx::Class::Schema::Loader::Base>.
31 $self->schema->storage->sql_maker->quote_char("`");
32 $self->schema->storage->sql_maker->name_sep(".");
34 $self->next::method(@_);
36 if (not defined $self->preserve_case) {
37 $self->preserve_case(0);
40 if ($self->db_schema && $self->db_schema->[0] eq '%') {
42 $self->_show_databases;
45 croak "no SHOW DATABASES privileges: $_";
50 not any { lc($schema) eq lc($_) } $self->_system_schemas
53 $self->db_schema(\@schemas);
60 return map $_->[0], @{ $self->dbh->selectall_arrayref('SHOW DATABASES') };
66 return ($self->next::method(@_), 'mysql');
70 my ($self, $table) = @_;
72 my $table_def_ref = eval { $self->dbh->selectrow_arrayref("SHOW CREATE TABLE ".$table->sql_name) };
73 my $table_def = $table_def_ref->[1];
75 return [] if not $table_def;
80 my (@reldata) = ($table_def =~
81 /CONSTRAINT ${qt}${nqt}+${qt} FOREIGN KEY \($qt(.*)$qt\) REFERENCES (?:$qt($nqt+)$qt\.)?$qt($nqt+)$qt \($qt(.+)$qt\)\s*(.*)/ig
85 while (scalar @reldata > 0) {
86 my ($cols, $f_schema, $f_table, $f_cols, $rest) = splice @reldata, 0, 5;
88 my @cols = map { s/$qt//g; $self->_lc($_) }
89 split(/$qt?\s*$qt?,$qt?\s*$qt?/, $cols);
91 my @f_cols = map { s/$qt//g; $self->_lc($_) }
92 split(/$qt?\s*$qt?,$qt?\s*$qt?/, $f_cols);
94 # Match case of remote schema to that in SHOW DATABASES, if it's there
95 # and we have permissions to run SHOW DATABASES.
98 lc($_) eq lc($f_schema)
99 } try { $self->_show_databases };
101 $f_schema = $matched if $matched;
104 my $remote_table = do {
105 # Get ->tables_list to return tables from the remote schema, in case it is not in the db_schema list.
106 local $self->{db_schema} = [ $f_schema ] if $f_schema;
109 lc($_->name) eq lc($f_table)
110 && ((not $f_schema) || lc($_->schema) eq lc($f_schema))
111 } $self->_tables_list;
114 # The table may not be in any database, or it may not have been found by the previous code block for whatever reason.
115 if (not $remote_table) {
116 my $remote_schema = $f_schema || $self->db_schema && @{ $self->db_schema } == 1 && $self->db_schema->[0];
118 $remote_table = DBIx::Class::Schema::Loader::Table->new(
122 schema => $remote_schema,
130 my @on_clauses = $rest =~ /(ON DELETE|ON UPDATE) (RESTRICT|CASCADE|SET NULL|NO ACTION) ?/ig;
132 while (my ($clause, $value) = splice @on_clauses, 0, 2) {
133 $clause = lc $clause;
138 $attrs{$clause} = $value;
142 # The default behavior is RESTRICT. Specifying RESTRICT explicitly just removes
143 # that ON clause from the SHOW CREATE TABLE output. For this reason, even
144 # though the default for these clauses everywhere else in Schema::Loader is
145 # CASCADE, we change the default here to RESTRICT in order to reproduce the
147 $attrs{on_delete} ||= 'RESTRICT';
148 $attrs{on_update} ||= 'RESTRICT';
150 # MySQL does not have a DEFERRABLE attribute, but there is a way to defer FKs.
151 $attrs{is_deferrable} = 1;
154 local_columns => \@cols,
155 remote_columns => \@f_cols,
156 remote_table => $remote_table,
164 # primary and unique info comes from the same sql statement,
165 # so cache it here for both routines to use
166 sub _mysql_table_get_keys {
167 my ($self, $table) = @_;
169 if(!exists($self->{_cache}->{_mysql_keys}->{$table->sql_name})) {
171 my $sth = $self->dbh->prepare('SHOW INDEX FROM '.$table->sql_name);
173 while(my $row = $sth->fetchrow_hashref) {
174 next if $row->{Non_unique};
175 push(@{$keydata{$row->{Key_name}}},
176 [ $row->{Seq_in_index}, $self->_lc($row->{Column_name}) ]
179 foreach my $keyname (keys %keydata) {
180 my @ordered_cols = map { $_->[1] } sort { $a->[0] <=> $b->[0] }
181 @{$keydata{$keyname}};
182 $keydata{$keyname} = \@ordered_cols;
184 $self->{_cache}->{_mysql_keys}->{$table->sql_name} = \%keydata;
187 return $self->{_cache}->{_mysql_keys}->{$table->sql_name};
191 my ( $self, $table ) = @_;
193 return $self->_mysql_table_get_keys($table)->{PRIMARY};
196 sub _table_uniq_info {
197 my ( $self, $table ) = @_;
200 my $keydata = $self->_mysql_table_get_keys($table);
201 foreach my $keyname (sort keys %$keydata) {
202 next if $keyname eq 'PRIMARY';
203 push(@uniqs, [ $keyname => $keydata->{$keyname} ]);
209 sub _columns_info_for {
213 my $result = $self->next::method(@_);
215 while (my ($col, $info) = each %$result) {
216 if ($info->{data_type} eq 'int') {
217 $info->{data_type} = 'integer';
219 elsif ($info->{data_type} eq 'double') {
220 $info->{data_type} = 'double precision';
222 my $data_type = $info->{data_type};
224 delete $info->{size} if $data_type !~ /^(?: (?:var)?(?:char(?:acter)?|binary) | bit | year)\z/ix;
226 # information_schema is available in 5.0+
227 my ($precision, $scale, $column_type, $default) = eval { $self->dbh->selectrow_array(<<'EOF', {}, $table->name, lc($col)) };
228 SELECT numeric_precision, numeric_scale, column_type, column_default
229 FROM information_schema.columns
230 WHERE table_schema = schema() AND table_name = ? AND lower(column_name) = ?
232 my $has_information_schema = not $@;
234 $column_type = '' if not defined $column_type;
236 if ($data_type eq 'bit' && (not exists $info->{size})) {
237 $info->{size} = $precision if defined $precision;
239 elsif ($data_type =~ /^(?:float|double precision|decimal)\z/i) {
240 if (defined $precision && defined $scale) {
241 if ($precision == 10 && $scale == 0) {
242 delete $info->{size};
245 $info->{size} = [$precision,$scale];
249 elsif ($data_type eq 'year') {
250 if ($column_type =~ /\(2\)/) {
253 elsif ($column_type =~ /\(4\)/ || $info->{size} == 4) {
254 delete $info->{size};
257 elsif ($data_type =~ /^(?:date(?:time)?|timestamp)\z/) {
258 if (not (defined $self->datetime_undef_if_invalid && $self->datetime_undef_if_invalid == 0)) {
259 $info->{datetime_undef_if_invalid} = 1;
262 elsif ($data_type =~ /^(?:enum|set)\z/ && $has_information_schema
263 && $column_type =~ /^(?:enum|set)\(/) {
265 delete $info->{extra}{list};
267 while ($column_type =~ /'((?:[^']* (?:''|\\')* [^']*)* [^\\']?)',?/xg) {
270 push @{ $info->{extra}{list} }, $el;
274 # Sometimes apparently there's a bug where default_value gets set to ''
275 # for things that don't actually have or support that default (like ints.)
276 if (exists $info->{default_value} && $info->{default_value} eq '') {
277 if ($has_information_schema) {
278 if (not defined $default) {
279 delete $info->{default_value};
282 else { # just check if it's a char/text type, otherwise remove
283 delete $info->{default_value} unless $data_type =~ /char|text/i;
291 sub _extra_column_info {
292 no warnings 'uninitialized';
293 my ($self, $table, $col, $info, $dbi_info) = @_;
296 if ($dbi_info->{mysql_is_auto_increment}) {
297 $extra_info{is_auto_increment} = 1
299 if ($dbi_info->{mysql_type_name} =~ /\bunsigned\b/i) {
300 $extra_info{extra}{unsigned} = 1;
302 if ($dbi_info->{mysql_values}) {
303 $extra_info{extra}{list} = $dbi_info->{mysql_values};
305 if ((not blessed $dbi_info) # isa $sth
306 && lc($dbi_info->{COLUMN_DEF}) eq 'current_timestamp'
307 && lc($dbi_info->{mysql_type_name}) eq 'timestamp') {
309 my $current_timestamp = 'current_timestamp';
310 $extra_info{default_value} = \$current_timestamp;
316 sub _dbh_column_info {
319 local $SIG{__WARN__} = sigwarn_silencer(
320 qr/^column_info: unrecognized column type/
323 $self->next::method(@_);
327 my ( $self, $table ) = @_;
328 my $comment = $self->next::method($table);
330 ($comment) = try { $self->schema->storage->dbh->selectrow_array(
331 qq{SELECT table_comment
332 FROM information_schema.tables
333 WHERE table_schema = schema()
335 }, undef, $table->name);
337 # InnoDB likes to auto-append crap.
341 elsif ($comment =~ /^InnoDB free:/) {
345 $comment =~ s/; InnoDB.*//;
351 sub _column_comment {
352 my ( $self, $table, $column_number, $column_name ) = @_;
353 my $comment = $self->next::method($table, $column_number, $column_name);
355 ($comment) = try { $self->schema->storage->dbh->selectrow_array(
356 qq{SELECT column_comment
357 FROM information_schema.columns
358 WHERE table_schema = schema()
360 AND lower(column_name) = ?
361 }, undef, $table->name, lc($column_name));
369 L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>,
370 L<DBIx::Class::Schema::Loader::DBI>
374 See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>.
378 This library is free software; you can redistribute it and/or modify it under
379 the same terms as Perl itself.
384 # vim:et sw=4 sts=4 tw=0: