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1 | package DBIx::Class::Storage::DBI::Oracle::Generic; |
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2 | # -*- mode: cperl; cperl-indent-level: 2 -*- |
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3 | |
4 | use strict; |
5 | use warnings; |
6 | |
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7 | =head1 NAME |
8 | |
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9 | DBIx::Class::Storage::DBI::Oracle::Generic - Automatic primary key class for Oracle |
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10 | |
11 | =head1 SYNOPSIS |
12 | |
13 | # In your table classes |
14 | __PACKAGE__->load_components(qw/PK::Auto Core/); |
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15 | __PACKAGE__->add_columns({ id => { sequence => 'mysequence', auto_nextval => 1 } }); |
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16 | __PACKAGE__->set_primary_key('id'); |
17 | __PACKAGE__->sequence('mysequence'); |
18 | |
19 | =head1 DESCRIPTION |
20 | |
21 | This class implements autoincrements for Oracle. |
22 | |
23 | =head1 METHODS |
24 | |
25 | =cut |
26 | |
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27 | use Carp::Clan qw/^DBIx::Class/; |
28 | |
29 | use base qw/DBIx::Class::Storage::DBI::MultiDistinctEmulation/; |
30 | |
31 | # __PACKAGE__->load_components(qw/PK::Auto/); |
32 | |
33 | sub _dbh_last_insert_id { |
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34 | my ($self, $dbh, $source, @columns) = @_; |
35 | my @ids = (); |
36 | foreach my $col (@columns) { |
37 | my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col)); |
38 | my $id = $self->_sequence_fetch( 'currval', $seq ); |
39 | push @ids, $id; |
40 | } |
41 | return @ids; |
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42 | } |
43 | |
44 | sub _dbh_get_autoinc_seq { |
45 | my ($self, $dbh, $source, $col) = @_; |
46 | |
47 | # look up the correct sequence automatically |
48 | my $sql = q{ |
49 | SELECT trigger_body FROM ALL_TRIGGERS t |
50 | WHERE t.table_name = ? |
51 | AND t.triggering_event = 'INSERT' |
52 | AND t.status = 'ENABLED' |
53 | }; |
54 | |
55 | # trigger_body is a LONG |
56 | $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024); |
57 | |
58 | my $sth = $dbh->prepare($sql); |
59 | $sth->execute( uc($source->name) ); |
60 | while (my ($insert_trigger) = $sth->fetchrow_array) { |
61 | return uc($1) if $insert_trigger =~ m!(\w+)\.nextval!i; # col name goes here??? |
62 | } |
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63 | $self->throw_exception("Unable to find a sequence INSERT trigger on table '" . $source->name . "'."); |
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64 | } |
65 | |
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66 | sub _sequence_fetch { |
67 | my ( $self, $type, $seq ) = @_; |
68 | my ($id) = $self->dbh->selectrow_array("SELECT ${seq}.${type} FROM DUAL"); |
69 | return $id; |
70 | } |
71 | |
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72 | sub _dbh_execute { |
73 | my $self = shift; |
74 | my ($dbh, $op, $extra_bind, $ident, $bind_attributes, @args) = @_; |
75 | |
76 | my $wantarray = wantarray; |
77 | my @res; |
78 | my $exception; |
79 | |
80 | my $try = 2; |
81 | |
82 | while ($try--) { |
83 | eval { |
84 | if ($wantarray) { |
85 | @res = $self->SUPER::_dbh_execute(@_); |
86 | } else { |
87 | $res[0] = $self->SUPER::_dbh_execute(@_); |
88 | } |
89 | }; |
90 | $exception = $@; |
91 | if ($exception =~ /ORA-(?:00028|01012)/) { |
92 | # ORA-00028: your session has been killed |
93 | # ORA-01012: not logged on |
94 | $self->disconnect; |
95 | |
96 | $self->throw_exception($exception) if $self->{_in_dbh_do}; |
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97 | $self->throw_exception($exception) if $self->transaction_depth; |
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98 | |
99 | $self->ensure_connected; |
100 | } elsif ($exception =~ /ORA-01003/) { # invalid cursor |
101 | # ORA-01003: no statement parsed (someone renamed a column or something, |
102 | # invalidating your cursor.) |
103 | my ($sql, $bind) = $self->_prep_for_execute($op, $extra_bind, $ident, \@args); |
104 | delete $dbh->{CachedKids}{$sql}; |
105 | } else { |
106 | last; |
107 | } |
108 | } |
109 | |
110 | $self->throw_exception($exception) if $exception; |
111 | |
112 | wantarray ? @res : $res[0] |
113 | } |
114 | |
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115 | =head2 get_autoinc_seq |
116 | |
117 | Returns the sequence name for an autoincrement column |
118 | |
119 | =cut |
120 | |
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121 | sub get_autoinc_seq { |
122 | my ($self, $source, $col) = @_; |
123 | |
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124 | $self->dbh_do('_dbh_get_autoinc_seq', $source, $col); |
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125 | } |
126 | |
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127 | =head2 columns_info_for |
128 | |
129 | This wraps the superclass version of this method to force table |
130 | names to uppercase |
131 | |
132 | =cut |
133 | |
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134 | sub columns_info_for { |
135 | my ($self, $table) = @_; |
136 | |
137 | $self->next::method(uc($table)); |
138 | } |
139 | |
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140 | =head2 datetime_parser_type |
141 | |
142 | This sets the proper DateTime::Format module for use with |
143 | L<DBIx::Class::InflateColumn::DateTime>. |
144 | |
145 | =cut |
146 | |
147 | sub datetime_parser_type { return "DateTime::Format::Oracle"; } |
148 | |
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149 | sub _svp_begin { |
150 | my ($self, $name) = @_; |
151 | |
152 | $self->dbh->do("SAVEPOINT $name"); |
153 | } |
154 | |
155 | # Oracle automatically releases a savepoint when you start another one with the |
156 | # same name. |
157 | sub _svp_release { 1 } |
158 | |
159 | sub _svp_rollback { |
160 | my ($self, $name) = @_; |
161 | |
162 | $self->dbh->do("ROLLBACK TO SAVEPOINT $name") |
163 | } |
164 | |
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165 | =head1 AUTHORS |
166 | |
167 | Andy Grundman <andy@hybridized.org> |
168 | |
169 | Scott Connelly <scottsweep@yahoo.com> |
170 | |
171 | =head1 LICENSE |
172 | |
173 | You may distribute this code under the same terms as Perl itself. |
174 | |
175 | =cut |
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176 | |
177 | 1; |