1package DBIx::Class::Schema::Loader::DBI::Pg; 2 3use strict; 4use warnings; 5use base 'DBIx::Class::Schema::Loader::DBI::Component::QuotedDefault'; 6use mro 'c3'; 7 8our $VERSION = '0.07033'; 9 10=head1 NAME 11 12DBIx::Class::Schema::Loader::DBI::Pg - DBIx::Class::Schema::Loader::DBI 13PostgreSQL Implementation. 14 15=head1 DESCRIPTION 16 17See L<DBIx::Class::Schema::Loader> and L<DBIx::Class::Schema::Loader::Base>. 18 19=cut 20 21sub _setup { 22 my $self = shift; 23 24 $self->next::method(@_); 25 26 $self->{db_schema} ||= ['public']; 27 28 if (not defined $self->preserve_case) { 29 $self->preserve_case(0); 30 } 31 elsif ($self->preserve_case) { 32 $self->schema->storage->sql_maker->quote_char('"'); 33 $self->schema->storage->sql_maker->name_sep('.'); 34 } 35} 36 37sub _system_schemas { 38 my $self = shift; 39 40 return ($self->next::method(@_), 'pg_catalog'); 41} 42 43sub _table_fk_info { 44 my ($self, $table) = @_; 45 46 my $sth = $self->dbh->prepare_cached(<<"EOF"); 47SELECT rc.constraint_name, rc.unique_constraint_schema, uk_tc.table_name, 48 fk_kcu.column_name, uk_kcu.column_name, rc.delete_rule, rc.update_rule, 49 fk_tc.is_deferrable 50FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS fk_tc 51JOIN INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS rc 52 ON rc.constraint_name = fk_tc.constraint_name 53 AND rc.constraint_schema = fk_tc.table_schema 54JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE fk_kcu 55 ON fk_kcu.constraint_name = fk_tc.constraint_name 56 AND fk_kcu.table_name = fk_tc.table_name 57 AND fk_kcu.table_schema = fk_tc.table_schema 58JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS uk_tc 59 ON uk_tc.constraint_name = rc.unique_constraint_name 60 AND uk_tc.table_schema = rc.unique_constraint_schema 61JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE uk_kcu 62 ON uk_kcu.constraint_name = rc.unique_constraint_name 63 AND uk_kcu.ordinal_position = fk_kcu.ordinal_position 64 AND uk_kcu.table_name = uk_tc.table_name 65 AND uk_kcu.table_schema = rc.unique_constraint_schema 66WHERE fk_tc.table_name = ? 67 AND fk_tc.table_schema = ? 68ORDER BY fk_kcu.ordinal_position 69EOF 70 71 $sth->execute($table->name, $table->schema); 72 73 my %rels; 74 75 while (my ($fk, $remote_schema, $remote_table, $col, $remote_col, 76 $delete_rule, $update_rule, $is_deferrable) = $sth->fetchrow_array) { 77 push @{ $rels{$fk}{local_columns} }, $self->_lc($col); 78 push @{ $rels{$fk}{remote_columns} }, $self->_lc($remote_col); 79 80 $rels{$fk}{remote_table} = DBIx::Class::Schema::Loader::Table->new( 81 loader => $self, 82 name => $remote_table, 83 schema => $remote_schema, 84 ) unless exists $rels{$fk}{remote_table}; 85 86 $rels{$fk}{attrs} ||= { 87 on_delete => uc $delete_rule, 88 on_update => uc $update_rule, 89 is_deferrable => uc $is_deferrable eq 'YES' ? 1 : 0, 90 }; 91 } 92 93 return [ values %rels ]; 94} 95 96 97sub _table_uniq_info { 98 my ($self, $table) = @_; 99 100 # Use the default support if available 101 return $self->next::method($table) 102 if $DBD::Pg::VERSION >= 1.50; 103 104 my @uniqs; 105 106 # Most of the SQL here is mostly based on 107 # Rose::DB::Object::Metadata::Auto::Pg, after some prodding from 108 # John Siracusa to use his superior SQL code :) 109 110 my $attr_sth = $self->{_cache}->{pg_attr_sth} ||= $self->dbh->prepare( 111 q{SELECT attname FROM pg_catalog.pg_attribute 112 WHERE attrelid = ? AND attnum = ?} 113 ); 114 115 my $uniq_sth = $self->{_cache}->{pg_uniq_sth} ||= $self->dbh->prepare( 116 q{SELECT x.indrelid, i.relname, x.indkey 117 FROM 118 pg_catalog.pg_index x 119 JOIN pg_catalog.pg_class c ON c.oid = x.indrelid 120 JOIN pg_catalog.pg_class i ON i.oid = x.indexrelid 121 JOIN pg_catalog.pg_constraint con ON con.conname = i.relname 122 LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace 123 WHERE 124 x.indisunique = 't' AND 125 c.relkind = 'r' AND 126 i.relkind = 'i' AND 127 con.contype = 'u' AND 128 n.nspname = ? AND 129 c.relname = ?} 130 ); 131 132 $uniq_sth->execute($table->schema, $table->name); 133 while(my $row = $uniq_sth->fetchrow_arrayref) { 134 my ($tableid, $indexname, $col_nums) = @$row; 135 $col_nums =~ s/^\s+//; 136 my @col_nums = split(/\s+/, $col_nums); 137 my @col_names; 138 139 foreach (@col_nums) { 140 $attr_sth->execute($tableid, $_); 141 my $name_aref = $attr_sth->fetchrow_arrayref; 142 push(@col_names, $self->_lc($name_aref->[0])) if $name_aref; 143 } 144 145 if(!@col_names) { 146 warn "Failed to parse UNIQUE constraint $indexname on $table"; 147 } 148 else { 149 push(@uniqs, [ $indexname => \@col_names ]); 150 } 151 } 152 153 return \@uniqs; 154} 155 156sub _table_comment { 157 my $self = shift; 158 my ($table) = @_; 159 160 my $table_comment = $self->next::method(@_); 161 162 return $table_comment if $table_comment; 163 164 ($table_comment) = $self->dbh->selectrow_array(<<'EOF', {}, $table->name, $table->schema); 165SELECT obj_description(oid) 166FROM pg_class 167WHERE relname=? AND relnamespace=(SELECT oid FROM pg_namespace WHERE nspname=?) 168EOF 169 170 return $table_comment 171} 172 173 174sub _column_comment { 175 my $self = shift; 176 my ($table, $column_number, $column_name) = @_; 177 178 my $column_comment = $self->next::method(@_); 179 180 return $column_comment if $column_comment; 181 182 my ($table_oid) = $self->dbh->selectrow_array(<<'EOF', {}, $table->name, $table->schema); 183SELECT oid 184FROM pg_class 185WHERE relname=? AND relnamespace=(SELECT oid FROM pg_namespace WHERE nspname=?) 186EOF 187 188 return $self->dbh->selectrow_array('SELECT col_description(?,?)', {}, $table_oid, $column_number); 189} 190 191# Make sure data_type's that don't need it don't have a 'size' column_info, and 192# set the correct precision for datetime and varbit types. 193sub _columns_info_for { 194 my $self = shift; 195 my ($table) = @_; 196 197 my $result = $self->next::method(@_); 198 199 while (my ($col, $info) = each %$result) { 200 my $data_type = $info->{data_type}; 201 202 # these types are fixed size 203 # XXX should this be a negative match? 204 if ($data_type =~ 205/^(?:bigint|int8|bigserial|serial8|bool(?:ean)?|box|bytea|cidr|circle|date|double precision|float8|inet|integer|int|int4|line|lseg|macaddr|money|path|point|polygon|real|float4|smallint|int2|serial|serial4|text)\z/i) { 206 delete $info->{size}; 207 } 208# for datetime types, check if it has a precision or not 209 elsif ($data_type =~ /^(?:interval|time|timestamp)\b/i) { 210 if (lc($data_type) eq 'timestamp without time zone') { 211 $info->{data_type} = 'timestamp'; 212 } 213 elsif (lc($data_type) eq 'time without time zone') { 214 $info->{data_type} = 'time'; 215 } 216 217 my ($precision) = $self->schema->storage->dbh 218 ->selectrow_array(<<EOF, {}, $table->name, $col); 219SELECT datetime_precision 220FROM information_schema.columns 221WHERE table_name = ? and column_name = ? 222EOF 223 224 if ($data_type =~ /^time\b/i) { 225 if ((not $precision) || $precision !~ /^\d/) { 226 delete $info->{size}; 227 } 228 else { 229 my ($integer_datetimes) = $self->dbh 230 ->selectrow_array('show integer_datetimes'); 231 232 my $max_precision = 233 $integer_datetimes =~ /^on\z/i ? 6 : 10; 234 235 if ($precision == $max_precision) { 236 delete $info->{size}; 237 } 238 else { 239 $info->{size} = $precision; 240 } 241 } 242 } 243 elsif ((not $precision) || $precision !~ /^\d/ || $precision == 6) { 244 delete $info->{size}; 245 } 246 else { 247 $info->{size} = $precision; 248 } 249 } 250 elsif ($data_type =~ /^(?:bit(?: varying)?|varbit)\z/i) { 251 $info->{data_type} = 'varbit' if $data_type =~ /var/i; 252 253 my ($precision) = $self->dbh->selectrow_array(<<EOF, {}, $table->name, $col); 254SELECT character_maximum_length 255FROM information_schema.columns 256WHERE table_name = ? and column_name = ? 257EOF 258 259 $info->{size} = $precision if $precision; 260 261 $info->{size} = 1 if (not $precision) && lc($data_type) eq 'bit'; 262 } 263 elsif ($data_type =~ /^(?:numeric|decimal)\z/i && (my $size = $info->{size})) { 264 $size =~ s/\s*//g; 265 266 my ($scale, $precision) = split /,/, $size; 267 268 $info->{size} = [ $precision, $scale ]; 269 } 270 elsif (lc($data_type) eq 'character varying') { 271 $info->{data_type} = 'varchar'; 272 273 if (not $info->{size}) { 274 $info->{data_type} = 'text'; 275 $info->{original}{data_type} = 'varchar'; 276 } 277 } 278 elsif (lc($data_type) eq 'character') { 279 $info->{data_type} = 'char'; 280 } 281 else { 282 my ($typetype) = $self->schema->storage->dbh 283 ->selectrow_array(<<EOF, {}, $data_type); 284SELECT typtype 285FROM pg_catalog.pg_type 286WHERE typname = ? 287EOF 288 if ($typetype && $typetype eq 'e') { 289 # The following will extract a list of allowed values for the 290 # enum. 291 my $typevalues = $self->dbh 292 ->selectall_arrayref(<<EOF, {}, $info->{data_type}); 293SELECT e.enumlabel 294FROM pg_catalog.pg_enum e 295JOIN pg_catalog.pg_type t ON t.oid = e.enumtypid 296WHERE t.typname = ? 297EOF 298 299 $info->{extra}{list} = [ map { $_->[0] } @$typevalues ]; 300 301 # Store its original name in extra for SQLT to pick up. 302 $info->{extra}{custom_type_name} = $info->{data_type}; 303 304 $info->{data_type} = 'enum'; 305 306 delete $info->{size}; 307 } 308 } 309 310# process SERIAL columns 311 if (ref($info->{default_value}) eq 'SCALAR' 312 && ${ $info->{default_value} } =~ /\bnextval\('([^:]+)'/i) { 313 $info->{is_auto_increment} = 1; 314 $info->{sequence} = $1; 315 delete $info->{default_value}; 316 } 317 318# alias now() to current_timestamp for deploying to other DBs 319 if ((eval { lc ${ $info->{default_value} } }||'') eq 'now()') { 320 # do not use a ref to a constant, that breaks Data::Dump output 321 ${$info->{default_value}} = 'current_timestamp'; 322 323 my $now = 'now()'; 324 $info->{original}{default_value} = \$now; 325 } 326 327# detect 0/1 for booleans and rewrite 328 if ($data_type =~ /^bool/i && exists $info->{default_value}) { 329 if ($info->{default_value} eq '0') { 330 my $false = 'false'; 331 $info->{default_value} = \$false; 332 } 333 elsif ($info->{default_value} eq '1') { 334 my $true = 'true'; 335 $info->{default_value} = \$true; 336 } 337 } 338 } 339 340 return $result; 341} 342 343=head1 SEE ALSO 344 345L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>, 346L<DBIx::Class::Schema::Loader::DBI> 347 348=head1 AUTHOR 349 350See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>. 351 352=head1 LICENSE 353 354This library is free software; you can redistribute it and/or modify it under 355the same terms as Perl itself. 356 357=cut 358 3591; 360