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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 | |
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58 | my $sth; |
59 | |
60 | # check for fully-qualified name (eg. SCHEMA.TABLENAME) |
61 | if ( my ( $schema, $table ) = $source->name =~ /(\w+)\.(\w+)/ ) { |
62 | $sql = q{ |
63 | SELECT trigger_body FROM ALL_TRIGGERS t |
64 | WHERE t.owner = ? AND t.table_name = ? |
65 | AND t.triggering_event = 'INSERT' |
66 | AND t.status = 'ENABLED' |
67 | }; |
68 | $sth = $dbh->prepare($sql); |
69 | $sth->execute( uc($schema), uc($table) ); |
70 | } |
71 | else { |
72 | $sth = $dbh->prepare($sql); |
73 | $sth->execute( uc( $source->name ) ); |
74 | } |
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75 | while (my ($insert_trigger) = $sth->fetchrow_array) { |
76 | return uc($1) if $insert_trigger =~ m!(\w+)\.nextval!i; # col name goes here??? |
77 | } |
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78 | $self->throw_exception("Unable to find a sequence INSERT trigger on table '" . $source->name . "'."); |
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79 | } |
80 | |
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81 | sub _sequence_fetch { |
82 | my ( $self, $type, $seq ) = @_; |
83 | my ($id) = $self->dbh->selectrow_array("SELECT ${seq}.${type} FROM DUAL"); |
84 | return $id; |
85 | } |
86 | |
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87 | sub connected { |
88 | my $self = shift; |
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89 | |
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90 | if (not $self->SUPER::connected(@_)) { |
91 | return 0; |
92 | } |
93 | else { |
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94 | my $dbh = $self->_dbh; |
95 | |
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96 | local $dbh->{RaiseError} = 1; |
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97 | |
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98 | eval { |
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99 | my $ping_sth = $dbh->prepare_cached("select 1 from dual"); |
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100 | $ping_sth->execute; |
101 | $ping_sth->finish; |
102 | }; |
103 | |
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104 | return $@ ? 0 : 1; |
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105 | } |
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106 | } |
107 | |
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108 | sub _dbh_execute { |
109 | my $self = shift; |
110 | my ($dbh, $op, $extra_bind, $ident, $bind_attributes, @args) = @_; |
111 | |
112 | my $wantarray = wantarray; |
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113 | |
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114 | my (@res, $exception, $retried); |
115 | |
116 | do { |
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117 | eval { |
118 | if ($wantarray) { |
119 | @res = $self->SUPER::_dbh_execute(@_); |
120 | } else { |
121 | $res[0] = $self->SUPER::_dbh_execute(@_); |
122 | } |
123 | }; |
124 | $exception = $@; |
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125 | if ($exception =~ /ORA-01003/) { |
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126 | # ORA-01003: no statement parsed (someone changed the table somehow, |
127 | # invalidating your cursor.) |
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128 | my ($sql, $bind) = $self->_prep_for_execute($op, $extra_bind, $ident, \@args); |
129 | delete $dbh->{CachedKids}{$sql}; |
130 | } else { |
131 | last; |
132 | } |
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133 | } while (not $retried++); |
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134 | |
135 | $self->throw_exception($exception) if $exception; |
136 | |
137 | wantarray ? @res : $res[0] |
138 | } |
139 | |
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140 | =head2 get_autoinc_seq |
141 | |
142 | Returns the sequence name for an autoincrement column |
143 | |
144 | =cut |
145 | |
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146 | sub get_autoinc_seq { |
147 | my ($self, $source, $col) = @_; |
148 | |
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149 | $self->dbh_do('_dbh_get_autoinc_seq', $source, $col); |
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150 | } |
151 | |
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152 | =head2 columns_info_for |
153 | |
154 | This wraps the superclass version of this method to force table |
155 | names to uppercase |
156 | |
157 | =cut |
158 | |
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159 | sub columns_info_for { |
160 | my ($self, $table) = @_; |
161 | |
162 | $self->next::method(uc($table)); |
163 | } |
164 | |
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165 | =head2 datetime_parser_type |
166 | |
167 | This sets the proper DateTime::Format module for use with |
168 | L<DBIx::Class::InflateColumn::DateTime>. |
169 | |
170 | =cut |
171 | |
172 | sub datetime_parser_type { return "DateTime::Format::Oracle"; } |
173 | |
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174 | sub _svp_begin { |
175 | my ($self, $name) = @_; |
176 | |
177 | $self->dbh->do("SAVEPOINT $name"); |
178 | } |
179 | |
180 | # Oracle automatically releases a savepoint when you start another one with the |
181 | # same name. |
182 | sub _svp_release { 1 } |
183 | |
184 | sub _svp_rollback { |
185 | my ($self, $name) = @_; |
186 | |
187 | $self->dbh->do("ROLLBACK TO SAVEPOINT $name") |
188 | } |
189 | |
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190 | =head1 AUTHORS |
191 | |
192 | Andy Grundman <andy@hybridized.org> |
193 | |
194 | Scott Connelly <scottsweep@yahoo.com> |
195 | |
196 | =head1 LICENSE |
197 | |
198 | You may distribute this code under the same terms as Perl itself. |
199 | |
200 | =cut |
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201 | |
202 | 1; |