1 package DBIx::Class::Schema::Loader::DBI::Pg;
5 use base 'DBIx::Class::Schema::Loader::DBI::Component::QuotedDefault';
8 our $VERSION = '0.07034_02';
12 DBIx::Class::Schema::Loader::DBI::Pg - DBIx::Class::Schema::Loader::DBI
13 PostgreSQL Implementation.
17 See L<DBIx::Class::Schema::Loader> and L<DBIx::Class::Schema::Loader::Base>.
24 $self->next::method(@_);
26 $self->{db_schema} ||= ['public'];
28 if (not defined $self->preserve_case) {
29 $self->preserve_case(0);
31 elsif ($self->preserve_case) {
32 $self->schema->storage->sql_maker->quote_char('"');
33 $self->schema->storage->sql_maker->name_sep('.');
40 return ($self->next::method(@_), 'pg_catalog');
52 my ($self, $table) = @_;
54 my $sth = $self->dbh->prepare_cached(<<"EOF");
55 select q.constr_name, q.to_schema, q.to_table, from_cols.attname from_col, to_cols.attname to_col,
56 q.on_delete, q.on_update, q.is_deferrable
57 from (select constr.conname constr_name, to_ns.nspname to_schema, to_class.relname to_table,
58 unnest(constr.conkey) from_colnum, unnest(constr.confkey) to_colnum,
59 constr.confdeltype on_delete, constr.confupdtype on_update,
60 constr.condeferrable is_deferrable,
61 constr.conrelid conrelid, constr.confrelid confrelid
62 from pg_constraint constr
63 join pg_namespace from_ns on constr.connamespace = from_ns.oid
64 join pg_class from_class on constr.conrelid = from_class.oid and from_class.relnamespace = from_ns.oid
65 join pg_class to_class on constr.confrelid = to_class.oid
66 join pg_namespace to_ns on to_class.relnamespace = to_ns.oid
67 where from_ns.nspname = ?
68 and from_class.relname = ?
69 and from_class.relkind = 'r'
70 and constr.contype = 'f'
72 join pg_attribute from_cols on from_cols.attrelid = q.conrelid and from_cols.attnum = q.from_colnum
73 join pg_attribute to_cols on to_cols.attrelid = q.confrelid and to_cols.attnum = q.to_colnum;
76 $sth->execute($table->schema, $table->name);
80 while (my ($fk, $remote_schema, $remote_table, $col, $remote_col,
81 $delete_rule, $update_rule, $is_deferrable) = $sth->fetchrow_array) {
82 push @{ $rels{$fk}{local_columns} }, $self->_lc($col);
83 push @{ $rels{$fk}{remote_columns} }, $self->_lc($remote_col);
85 $rels{$fk}{remote_table} = DBIx::Class::Schema::Loader::Table->new(
87 name => $remote_table,
88 schema => $remote_schema,
89 ) unless exists $rels{$fk}{remote_table};
91 $rels{$fk}{attrs} ||= {
92 on_delete => $pg_rules{$delete_rule},
93 on_update => $pg_rules{$update_rule},
94 is_deferrable => $is_deferrable,
98 return [ values %rels ];
102 sub _table_uniq_info {
103 my ($self, $table) = @_;
105 # Use the default support if available
106 return $self->next::method($table)
107 if $DBD::Pg::VERSION >= 1.50;
111 # Most of the SQL here is mostly based on
112 # Rose::DB::Object::Metadata::Auto::Pg, after some prodding from
113 # John Siracusa to use his superior SQL code :)
115 my $attr_sth = $self->{_cache}->{pg_attr_sth} ||= $self->dbh->prepare(
116 q{SELECT attname FROM pg_catalog.pg_attribute
117 WHERE attrelid = ? AND attnum = ?}
120 my $uniq_sth = $self->{_cache}->{pg_uniq_sth} ||= $self->dbh->prepare(
121 q{SELECT x.indrelid, i.relname, x.indkey
123 pg_catalog.pg_index x
124 JOIN pg_catalog.pg_class c ON c.oid = x.indrelid
125 JOIN pg_catalog.pg_class i ON i.oid = x.indexrelid
126 JOIN pg_catalog.pg_constraint con ON con.conname = i.relname
127 LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
129 x.indisunique = 't' AND
132 con.contype = 'u' AND
137 $uniq_sth->execute($table->schema, $table->name);
138 while(my $row = $uniq_sth->fetchrow_arrayref) {
139 my ($tableid, $indexname, $col_nums) = @$row;
140 $col_nums =~ s/^\s+//;
141 my @col_nums = split(/\s+/, $col_nums);
144 foreach (@col_nums) {
145 $attr_sth->execute($tableid, $_);
146 my $name_aref = $attr_sth->fetchrow_arrayref;
147 push(@col_names, $self->_lc($name_aref->[0])) if $name_aref;
151 warn "Failed to parse UNIQUE constraint $indexname on $table";
154 push(@uniqs, [ $indexname => \@col_names ]);
165 my $table_comment = $self->next::method(@_);
167 return $table_comment if $table_comment;
169 ($table_comment) = $self->dbh->selectrow_array(<<'EOF', {}, $table->name, $table->schema);
170 SELECT obj_description(oid)
172 WHERE relname=? AND relnamespace=(SELECT oid FROM pg_namespace WHERE nspname=?)
175 return $table_comment
179 sub _column_comment {
181 my ($table, $column_number, $column_name) = @_;
183 my $column_comment = $self->next::method(@_);
185 return $column_comment if $column_comment;
187 my ($table_oid) = $self->dbh->selectrow_array(<<'EOF', {}, $table->name, $table->schema);
190 WHERE relname=? AND relnamespace=(SELECT oid FROM pg_namespace WHERE nspname=?)
193 return $self->dbh->selectrow_array('SELECT col_description(?,?)', {}, $table_oid, $column_number);
196 # Make sure data_type's that don't need it don't have a 'size' column_info, and
197 # set the correct precision for datetime and varbit types.
198 sub _columns_info_for {
202 my $result = $self->next::method(@_);
204 while (my ($col, $info) = each %$result) {
205 my $data_type = $info->{data_type};
207 # these types are fixed size
208 # XXX should this be a negative match?
210 /^(?: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) {
211 delete $info->{size};
213 # for datetime types, check if it has a precision or not
214 elsif ($data_type =~ /^(?:interval|time|timestamp)\b/i) {
215 if (lc($data_type) eq 'timestamp without time zone') {
216 $info->{data_type} = 'timestamp';
218 elsif (lc($data_type) eq 'time without time zone') {
219 $info->{data_type} = 'time';
222 my ($precision) = $self->schema->storage->dbh
223 ->selectrow_array(<<EOF, {}, $table->name, $col);
224 SELECT datetime_precision
225 FROM information_schema.columns
226 WHERE table_name = ? and column_name = ?
229 if ($data_type =~ /^time\b/i) {
230 if ((not $precision) || $precision !~ /^\d/) {
231 delete $info->{size};
234 my ($integer_datetimes) = $self->dbh
235 ->selectrow_array('show integer_datetimes');
238 $integer_datetimes =~ /^on\z/i ? 6 : 10;
240 if ($precision == $max_precision) {
241 delete $info->{size};
244 $info->{size} = $precision;
248 elsif ((not $precision) || $precision !~ /^\d/ || $precision == 6) {
249 delete $info->{size};
252 $info->{size} = $precision;
255 elsif ($data_type =~ /^(?:bit(?: varying)?|varbit)\z/i) {
256 $info->{data_type} = 'varbit' if $data_type =~ /var/i;
258 my ($precision) = $self->dbh->selectrow_array(<<EOF, {}, $table->name, $col);
259 SELECT character_maximum_length
260 FROM information_schema.columns
261 WHERE table_name = ? and column_name = ?
264 $info->{size} = $precision if $precision;
266 $info->{size} = 1 if (not $precision) && lc($data_type) eq 'bit';
268 elsif ($data_type =~ /^(?:numeric|decimal)\z/i && (my $size = $info->{size})) {
271 my ($scale, $precision) = split /,/, $size;
273 $info->{size} = [ $precision, $scale ];
275 elsif (lc($data_type) eq 'character varying') {
276 $info->{data_type} = 'varchar';
278 if (not $info->{size}) {
279 $info->{data_type} = 'text';
280 $info->{original}{data_type} = 'varchar';
283 elsif (lc($data_type) eq 'character') {
284 $info->{data_type} = 'char';
287 my ($typetype) = $self->schema->storage->dbh
288 ->selectrow_array(<<EOF, {}, $data_type);
290 FROM pg_catalog.pg_type
293 if ($typetype && $typetype eq 'e') {
294 # The following will extract a list of allowed values for the
296 my $typevalues = $self->dbh
297 ->selectall_arrayref(<<EOF, {}, $info->{data_type});
299 FROM pg_catalog.pg_enum e
300 JOIN pg_catalog.pg_type t ON t.oid = e.enumtypid
304 $info->{extra}{list} = [ map { $_->[0] } @$typevalues ];
306 # Store its original name in extra for SQLT to pick up.
307 $info->{extra}{custom_type_name} = $info->{data_type};
309 $info->{data_type} = 'enum';
311 delete $info->{size};
315 # process SERIAL columns
316 if (ref($info->{default_value}) eq 'SCALAR'
317 && ${ $info->{default_value} } =~ /\bnextval\('([^:]+)'/i) {
318 $info->{is_auto_increment} = 1;
319 $info->{sequence} = $1;
320 delete $info->{default_value};
323 # alias now() to current_timestamp for deploying to other DBs
324 if ((eval { lc ${ $info->{default_value} } }||'') eq 'now()') {
325 # do not use a ref to a constant, that breaks Data::Dump output
326 ${$info->{default_value}} = 'current_timestamp';
329 $info->{original}{default_value} = \$now;
332 # detect 0/1 for booleans and rewrite
333 if ($data_type =~ /^bool/i && exists $info->{default_value}) {
334 if ($info->{default_value} eq '0') {
336 $info->{default_value} = \$false;
338 elsif ($info->{default_value} eq '1') {
340 $info->{default_value} = \$true;
350 L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>,
351 L<DBIx::Class::Schema::Loader::DBI>
355 See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>.
359 This library is free software; you can redistribute it and/or modify it under
360 the same terms as Perl itself.