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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 | |
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9 | our $VERSION = '0.04999_11'; |
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10 | |
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11 | =head1 NAME |
12 | |
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13 | DBIx::Class::Schema::Loader::DBI::Pg - DBIx::Class::Schema::Loader::DBI |
14 | PostgreSQL Implementation. |
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15 | |
16 | =head1 SYNOPSIS |
17 | |
18 | package My::Schema; |
19 | use base qw/DBIx::Class::Schema::Loader/; |
20 | |
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21 | __PACKAGE__->loader_options( debug => 1 ); |
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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 | $self->{db_schema} ||= 'public'; |
36 | } |
37 | |
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38 | |
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39 | sub _table_uniq_info { |
40 | my ($self, $table) = @_; |
41 | |
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42 | # Use the default support if available |
43 | return $self->next::method($table) |
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44 | if $DBD::Pg::VERSION >= 1.50; |
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45 | |
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46 | my @uniqs; |
47 | my $dbh = $self->schema->storage->dbh; |
48 | |
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49 | # Most of the SQL here is mostly based on |
50 | # Rose::DB::Object::Metadata::Auto::Pg, after some prodding from |
51 | # John Siracusa to use his superior SQL code :) |
52 | |
53 | my $attr_sth = $self->{_cache}->{pg_attr_sth} ||= $dbh->prepare( |
54 | q{SELECT attname FROM pg_catalog.pg_attribute |
55 | WHERE attrelid = ? AND attnum = ?} |
56 | ); |
57 | |
58 | my $uniq_sth = $self->{_cache}->{pg_uniq_sth} ||= $dbh->prepare( |
59 | q{SELECT x.indrelid, i.relname, x.indkey |
60 | FROM |
61 | pg_catalog.pg_index x |
62 | JOIN pg_catalog.pg_class c ON c.oid = x.indrelid |
63 | JOIN pg_catalog.pg_class i ON i.oid = x.indexrelid |
64 | JOIN pg_catalog.pg_constraint con ON con.conname = i.relname |
65 | LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace |
66 | WHERE |
67 | x.indisunique = 't' AND |
68 | c.relkind = 'r' AND |
69 | i.relkind = 'i' AND |
70 | con.contype = 'u' AND |
71 | n.nspname = ? AND |
72 | c.relname = ?} |
73 | ); |
74 | |
75 | $uniq_sth->execute($self->db_schema, $table); |
76 | while(my $row = $uniq_sth->fetchrow_arrayref) { |
77 | my ($tableid, $indexname, $col_nums) = @$row; |
78 | $col_nums =~ s/^\s+//; |
79 | my @col_nums = split(/\s+/, $col_nums); |
80 | my @col_names; |
81 | |
82 | foreach (@col_nums) { |
83 | $attr_sth->execute($tableid, $_); |
84 | my $name_aref = $attr_sth->fetchrow_arrayref; |
85 | push(@col_names, $name_aref->[0]) if $name_aref; |
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86 | } |
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87 | |
88 | if(!@col_names) { |
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89 | warn "Failed to parse UNIQUE constraint $indexname on $table"; |
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90 | } |
91 | else { |
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92 | push(@uniqs, [ $indexname => \@col_names ]); |
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93 | } |
94 | } |
95 | |
96 | return \@uniqs; |
97 | } |
98 | |
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99 | sub _table_comment { |
100 | my ( $self, $table ) = @_; |
101 | my ($table_comment) = $self->schema->storage->dbh->selectrow_array( |
102 | q{SELECT obj_description(oid) |
103 | FROM pg_class |
104 | WHERE relname=? AND relnamespace=( |
105 | SELECT oid FROM pg_namespace WHERE nspname=?) |
106 | }, undef, $table, $self->db_schema |
107 | ); |
108 | return $table_comment |
109 | } |
110 | |
111 | |
112 | sub _column_comment { |
113 | my ( $self, $table, $column_number ) = @_; |
114 | my ($table_oid) = $self->schema->storage->dbh->selectrow_array( |
115 | q{SELECT oid |
116 | FROM pg_class |
117 | WHERE relname=? AND relnamespace=( |
118 | SELECT oid FROM pg_namespace WHERE nspname=?) |
119 | }, undef, $table, $self->db_schema |
120 | ); |
121 | return $self->schema->storage->dbh->selectrow_array('SELECT col_description(?,?)', undef, $table_oid, |
122 | $column_number ); |
123 | } |
124 | |
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125 | sub _extra_column_info { |
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126 | my ($self, $info) = @_; |
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127 | my %extra_info; |
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128 | |
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129 | if ($info->{COLUMN_DEF} && $info->{COLUMN_DEF} =~ /\bnextval\(/i) { |
130 | $extra_info{is_auto_increment} = 1; |
131 | } |
132 | |
133 | return \%extra_info; |
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134 | } |
135 | |
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136 | =head1 SEE ALSO |
137 | |
138 | L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>, |
139 | L<DBIx::Class::Schema::Loader::DBI> |
140 | |
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141 | =head1 AUTHOR |
142 | |
143 | See L<DBIx::Class::Schema::Loader/CONTRIBUTORS>. |
144 | |
145 | =head1 LICENSE |
146 | |
147 | This library is free software; you can redistribute it and/or modify it under |
148 | the same terms as Perl itself. |
149 | |
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150 | =cut |
151 | |
152 | 1; |