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1 | package DBIx::Class::Schema::Loader::DBI::Pg; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use base 'DBIx::Class::Schema::Loader::DBI'; |
6 | use Class::C3; |
7 | |
8 | =head1 NAME |
9 | |
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10 | DBIx::Class::Schema::Loader::DBI::Pg - DBIx::Class::Schema::Loader::DBI |
11 | PostgreSQL Implementation. |
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12 | |
13 | =head1 SYNOPSIS |
14 | |
15 | package My::Schema; |
16 | use base qw/DBIx::Class::Schema::Loader/; |
17 | |
18 | __PACKAGE__->loader_options( |
19 | relationships => 1, |
20 | ); |
21 | |
22 | 1; |
23 | |
24 | =head1 DESCRIPTION |
25 | |
26 | See L<DBIx::Class::Schema::Loader::Base>. |
27 | |
28 | =cut |
29 | |
30 | sub _setup { |
31 | my $self = shift; |
32 | |
33 | $self->next::method(@_); |
34 | $self->{db_schema} ||= 'public'; |
35 | } |
36 | |
37 | sub _table_uniq_info { |
38 | my ($self, $table) = @_; |
39 | |
40 | my @uniqs; |
41 | my $dbh = $self->schema->storage->dbh; |
42 | |
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43 | # Most of the SQL here is mostly based on |
44 | # Rose::DB::Object::Metadata::Auto::Pg, after some prodding from |
45 | # John Siracusa to use his superior SQL code :) |
46 | |
47 | my $attr_sth = $self->{_cache}->{pg_attr_sth} ||= $dbh->prepare( |
48 | q{SELECT attname FROM pg_catalog.pg_attribute |
49 | WHERE attrelid = ? AND attnum = ?} |
50 | ); |
51 | |
52 | my $uniq_sth = $self->{_cache}->{pg_uniq_sth} ||= $dbh->prepare( |
53 | q{SELECT x.indrelid, i.relname, x.indkey |
54 | FROM |
55 | pg_catalog.pg_index x |
56 | JOIN pg_catalog.pg_class c ON c.oid = x.indrelid |
57 | JOIN pg_catalog.pg_class i ON i.oid = x.indexrelid |
58 | JOIN pg_catalog.pg_constraint con ON con.conname = i.relname |
59 | LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace |
60 | WHERE |
61 | x.indisunique = 't' AND |
62 | c.relkind = 'r' AND |
63 | i.relkind = 'i' AND |
64 | con.contype = 'u' AND |
65 | n.nspname = ? AND |
66 | c.relname = ?} |
67 | ); |
68 | |
69 | $uniq_sth->execute($self->db_schema, $table); |
70 | while(my $row = $uniq_sth->fetchrow_arrayref) { |
71 | my ($tableid, $indexname, $col_nums) = @$row; |
72 | $col_nums =~ s/^\s+//; |
73 | my @col_nums = split(/\s+/, $col_nums); |
74 | my @col_names; |
75 | |
76 | foreach (@col_nums) { |
77 | $attr_sth->execute($tableid, $_); |
78 | my $name_aref = $attr_sth->fetchrow_arrayref; |
79 | push(@col_names, $name_aref->[0]) if $name_aref; |
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80 | } |
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81 | |
82 | if(!@col_names) { |
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83 | warn "Failed to parse UNIQUE constraint $indexname on $table"; |
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84 | } |
85 | else { |
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86 | push(@uniqs, [ $indexname => \@col_names ]); |
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87 | } |
88 | } |
89 | |
90 | return \@uniqs; |
91 | } |
92 | |
93 | =head1 SEE ALSO |
94 | |
95 | L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>, |
96 | L<DBIx::Class::Schema::Loader::DBI> |
97 | |
98 | =cut |
99 | |
100 | 1; |