Commit | Line | Data |
843f8ecd |
1 | package DBIx::Class::Storage::DBI::Pg; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
4ce3b851 |
6 | use base qw/DBIx::Class::Storage::DBI::MultiColumnIn/; |
ac45262b |
7 | use mro 'c3'; |
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8 | |
ac45262b |
9 | use DBD::Pg qw(:pg_types); |
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10 | |
ac45262b |
11 | # Ask for a DBD::Pg with array support |
c70c716e |
12 | warn "DBD::Pg 2.9.2 or greater is strongly recommended\n" |
ac45262b |
13 | if ($DBD::Pg::VERSION < 2.009002); # pg uses (used?) version::qv() |
17614944 |
14 | |
e96a93df |
15 | sub with_deferred_fk_checks { |
16 | my ($self, $sub) = @_; |
17 | |
9ae966b9 |
18 | $self->_get_dbh->do('SET CONSTRAINTS ALL DEFERRED'); |
e96a93df |
19 | $sub->(); |
20 | } |
21 | |
843f8ecd |
22 | sub last_insert_id { |
ca48cd7d |
23 | my ($self,$source,$col) = @_; |
5f70776f |
24 | my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col)) |
25 | or $self->throw_exception( "could not determine sequence for " |
26 | . $source->name |
27 | . ".$col, please consider adding a " |
28 | . "schema-qualified sequence to its column info" |
29 | ); |
9a0b7b26 |
30 | |
31 | $self->_dbh_last_insert_id ($self->_dbh, $seq); |
0680ac39 |
32 | } |
33 | |
9a0b7b26 |
34 | # there seems to be absolutely no reason to have this as a separate method, |
35 | # but leaving intact in case someone is already overriding it |
36 | sub _dbh_last_insert_id { |
37 | my ($self, $dbh, $seq) = @_; |
38 | $dbh->last_insert_id(undef, undef, undef, undef, {sequence => $seq}); |
39 | } |
40 | |
41 | |
1ff9c30d |
42 | sub _get_pg_search_path { |
43 | my ($self,$dbh) = @_; |
44 | # cache the search path as ['schema','schema',...] in the storage |
45 | # obj |
46 | $self->{_pg_search_path} ||= do { |
47 | my @search_path; |
48 | my ($sp_string) = $dbh->selectrow_array('SHOW search_path'); |
49 | while( $sp_string =~ s/("[^"]+"|[^,]+),?// ) { |
50 | unless( defined $1 and length $1 ) { |
51 | $self->throw_exception("search path sanity check failed: '$1'") |
52 | } |
53 | push @search_path, $1; |
54 | } |
55 | \@search_path |
56 | }; |
57 | } |
58 | |
d4f16b21 |
59 | sub _dbh_get_autoinc_seq { |
60 | my ($self, $dbh, $schema, $table, @pri) = @_; |
0680ac39 |
61 | |
7dfe289b |
62 | # get the list of postgres schemas to search. if we have a schema |
63 | # specified, use that. otherwise, use the search path |
64 | my @search_path; |
65 | if( defined $schema and length $schema ) { |
66 | @search_path = ( $schema ); |
67 | } else { |
1ff9c30d |
68 | @search_path = @{ $self->_get_pg_search_path($dbh) }; |
7dfe289b |
69 | } |
70 | |
71 | foreach my $search_schema (@search_path) { |
72 | foreach my $col (@pri) { |
73 | my $info = $dbh->column_info(undef,$search_schema,$table,$col)->fetchrow_hashref; |
74 | if($info) { |
75 | # if we get here, we have definitely found the right |
76 | # column. |
77 | if( defined $info->{COLUMN_DEF} and |
78 | $info->{COLUMN_DEF} |
79 | =~ /^nextval\(+'([^']+)'::(?:text|regclass)\)/i |
80 | ) { |
81 | my $seq = $1; |
5f70776f |
82 | |
83 | # have not figured out a 100% reliable way to tell |
84 | # what sequence is meant if it is not |
85 | # schema-qualified. see TODO tests in 72pg.t |
86 | if( $seq =~ /\./ ) { |
87 | return $seq; |
88 | } else { |
89 | # this guess is going to be incorrect some of |
90 | # the time, which could lead to problems that |
91 | # could be pretty hairy to trace. thus the |
92 | # warning. |
93 | $seq = $info->{TABLE_SCHEM} . "." . $seq; |
94 | warn "WARNING: guessing sequence '$seq' for key $search_schema.$table.$col\n"; |
95 | return $seq; |
96 | } |
97 | |
98 | # return our (schema-qualified) seq |
99 | return $seq; |
7dfe289b |
100 | } else { |
101 | # we have found the column, but cannot figure out |
102 | # the nextval seq |
103 | return; |
104 | } |
105 | } |
106 | } |
0680ac39 |
107 | } |
108 | return; |
843f8ecd |
109 | } |
110 | |
111 | sub get_autoinc_seq { |
ca48cd7d |
112 | my ($self,$source,$col) = @_; |
d4daee7b |
113 | |
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114 | my @pri = $source->primary_columns; |
80625830 |
115 | |
116 | my $schema; |
117 | my $table = $source->name; |
118 | |
119 | if (ref $table eq 'SCALAR') { |
120 | $table = $$table; |
121 | } |
122 | elsif ($table =~ /^(.+)\.(.+)$/) { |
123 | ($schema, $table) = ($1, $2); |
124 | } |
a9f32dbc |
125 | |
373940e1 |
126 | $self->dbh_do('_dbh_get_autoinc_seq', $schema, $table, @pri); |
843f8ecd |
127 | } |
128 | |
4f533e8c |
129 | sub sqlt_type { |
130 | return 'PostgreSQL'; |
131 | } |
132 | |
45fa8288 |
133 | sub datetime_parser_type { return "DateTime::Format::Pg"; } |
134 | |
a71859b4 |
135 | sub bind_attribute_by_data_type { |
136 | my ($self,$data_type) = @_; |
137 | |
138 | my $bind_attributes = { |
eda28767 |
139 | bytea => { pg_type => DBD::Pg::PG_BYTEA }, |
5ba88f68 |
140 | blob => { pg_type => DBD::Pg::PG_BYTEA }, |
a71859b4 |
141 | }; |
d4daee7b |
142 | |
a71859b4 |
143 | if( defined $bind_attributes->{$data_type} ) { |
9fdf90df |
144 | return $bind_attributes->{$data_type}; |
a71859b4 |
145 | } |
146 | else { |
147 | return; |
148 | } |
149 | } |
150 | |
f04b2839 |
151 | sub _sequence_fetch { |
152 | my ( $self, $type, $seq ) = @_; |
9ae966b9 |
153 | my ($id) = $self->_get_dbh->selectrow_array("SELECT nextval('${seq}')"); |
f04b2839 |
154 | return $id; |
155 | } |
156 | |
adb3554a |
157 | sub _svp_begin { |
eeb8cfeb |
158 | my ($self, $name) = @_; |
adb3554a |
159 | |
9ae966b9 |
160 | $self->_get_dbh->pg_savepoint($name); |
adb3554a |
161 | } |
162 | |
163 | sub _svp_release { |
eeb8cfeb |
164 | my ($self, $name) = @_; |
adb3554a |
165 | |
9ae966b9 |
166 | $self->_get_dbh->pg_release($name); |
adb3554a |
167 | } |
168 | |
169 | sub _svp_rollback { |
eeb8cfeb |
170 | my ($self, $name) = @_; |
adb3554a |
171 | |
9ae966b9 |
172 | $self->_get_dbh->pg_rollback_to($name); |
adb3554a |
173 | } |
174 | |
843f8ecd |
175 | 1; |
176 | |
75d07914 |
177 | =head1 NAME |
843f8ecd |
178 | |
179 | DBIx::Class::Storage::DBI::Pg - Automatic primary key class for PostgreSQL |
180 | |
181 | =head1 SYNOPSIS |
182 | |
183 | # In your table classes |
184 | __PACKAGE__->load_components(qw/PK::Auto Core/); |
185 | __PACKAGE__->set_primary_key('id'); |
186 | __PACKAGE__->sequence('mysequence'); |
187 | |
188 | =head1 DESCRIPTION |
189 | |
190 | This class implements autoincrements for PostgreSQL. |
191 | |
7c0176a1 |
192 | =head1 POSTGRESQL SCHEMA SUPPORT |
193 | |
194 | This supports multiple PostgreSQL schemas, with one caveat: for |
195 | performance reasons, the schema search path is queried the first time it is |
196 | needed and CACHED for subsequent uses. |
197 | |
198 | For this reason, you should do any necessary manipulation of the |
199 | PostgreSQL search path BEFORE instantiating your schema object, or as |
200 | part of the on_connect_do option to connect(), for example: |
201 | |
202 | my $schema = My::Schema->connect |
203 | ( $dsn,$user,$pass, |
204 | { on_connect_do => |
205 | [ 'SET search_path TO myschema, foo, public' ], |
206 | }, |
207 | ); |
208 | |
7ff926e6 |
209 | =head1 AUTHORS |
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210 | |
7ff926e6 |
211 | See L<DBIx::Class/CONTRIBUTORS> |
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212 | |
213 | =head1 LICENSE |
214 | |
215 | You may distribute this code under the same terms as Perl itself. |
216 | |
217 | =cut |