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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'; |
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6 | use Carp::Clan qw/^DBIx::Class/; |
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7 | use Class::C3; |
8 | |
9 | =head1 NAME |
10 | |
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11 | DBIx::Class::Schema::Loader::DBI::Pg - DBIx::Class::Schema::Loader::DBI |
12 | PostgreSQL Implementation. |
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13 | |
14 | =head1 SYNOPSIS |
15 | |
16 | package My::Schema; |
17 | use base qw/DBIx::Class::Schema::Loader/; |
18 | |
19 | __PACKAGE__->loader_options( |
20 | relationships => 1, |
21 | ); |
22 | |
23 | 1; |
24 | |
25 | =head1 DESCRIPTION |
26 | |
27 | See L<DBIx::Class::Schema::Loader::Base>. |
28 | |
29 | =cut |
30 | |
31 | sub _setup { |
32 | my $self = shift; |
33 | |
34 | $self->next::method(@_); |
35 | $self->{db_schema} ||= 'public'; |
36 | } |
37 | |
38 | sub _table_uniq_info { |
39 | my ($self, $table) = @_; |
40 | |
41 | my @uniqs; |
42 | my $dbh = $self->schema->storage->dbh; |
43 | |
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44 | # Most of the SQL here is mostly based on |
45 | # Rose::DB::Object::Metadata::Auto::Pg, after some prodding from |
46 | # John Siracusa to use his superior SQL code :) |
47 | |
48 | my $attr_sth = $self->{_cache}->{pg_attr_sth} ||= $dbh->prepare( |
49 | q{SELECT attname FROM pg_catalog.pg_attribute |
50 | WHERE attrelid = ? AND attnum = ?} |
51 | ); |
52 | |
53 | my $uniq_sth = $self->{_cache}->{pg_uniq_sth} ||= $dbh->prepare( |
54 | q{SELECT x.indrelid, i.relname, x.indkey |
55 | FROM |
56 | pg_catalog.pg_index x |
57 | JOIN pg_catalog.pg_class c ON c.oid = x.indrelid |
58 | JOIN pg_catalog.pg_class i ON i.oid = x.indexrelid |
59 | JOIN pg_catalog.pg_constraint con ON con.conname = i.relname |
60 | LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace |
61 | WHERE |
62 | x.indisunique = 't' AND |
63 | c.relkind = 'r' AND |
64 | i.relkind = 'i' AND |
65 | con.contype = 'u' AND |
66 | n.nspname = ? AND |
67 | c.relname = ?} |
68 | ); |
69 | |
70 | $uniq_sth->execute($self->db_schema, $table); |
71 | while(my $row = $uniq_sth->fetchrow_arrayref) { |
72 | my ($tableid, $indexname, $col_nums) = @$row; |
73 | $col_nums =~ s/^\s+//; |
74 | my @col_nums = split(/\s+/, $col_nums); |
75 | my @col_names; |
76 | |
77 | foreach (@col_nums) { |
78 | $attr_sth->execute($tableid, $_); |
79 | my $name_aref = $attr_sth->fetchrow_arrayref; |
80 | push(@col_names, $name_aref->[0]) if $name_aref; |
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81 | } |
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82 | |
83 | if(!@col_names) { |
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84 | warn "Failed to parse UNIQUE constraint $indexname on $table"; |
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85 | } |
86 | else { |
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87 | push(@uniqs, [ $indexname => \@col_names ]); |
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88 | } |
89 | } |
90 | |
91 | return \@uniqs; |
92 | } |
93 | |
94 | =head1 SEE ALSO |
95 | |
96 | L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>, |
97 | L<DBIx::Class::Schema::Loader::DBI> |
98 | |
99 | =cut |
100 | |
101 | 1; |