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1 | package DBIx::Class::Storage::DBI::Oracle::Generic; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
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6 | =head1 NAME |
7 | |
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8 | DBIx::Class::Storage::DBI::Oracle::Generic - Automatic primary key class for Oracle |
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9 | |
10 | =head1 SYNOPSIS |
11 | |
12 | # In your table classes |
13 | __PACKAGE__->load_components(qw/PK::Auto Core/); |
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14 | __PACKAGE__->add_columns({ id => { sequence => 'mysequence', auto_nextval => 1 } }); |
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15 | __PACKAGE__->set_primary_key('id'); |
16 | __PACKAGE__->sequence('mysequence'); |
17 | |
18 | =head1 DESCRIPTION |
19 | |
20 | This class implements autoincrements for Oracle. |
21 | |
22 | =head1 METHODS |
23 | |
24 | =cut |
25 | |
db56cf3d |
26 | use base qw/DBIx::Class::Storage::DBI/; |
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27 | use Carp::Clan qw/^DBIx::Class/; |
28 | |
66cf3a84 |
29 | # For ORA_BLOB => 113, ORA_CLOB => 112 |
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30 | use DBD::Oracle qw( :ora_types ); |
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31 | |
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32 | sub _dbh_last_insert_id { |
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33 | my ($self, $dbh, $source, @columns) = @_; |
34 | my @ids = (); |
35 | foreach my $col (@columns) { |
36 | my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col)); |
37 | my $id = $self->_sequence_fetch( 'currval', $seq ); |
38 | push @ids, $id; |
39 | } |
40 | return @ids; |
18360aed |
41 | } |
42 | |
43 | sub _dbh_get_autoinc_seq { |
44 | my ($self, $dbh, $source, $col) = @_; |
45 | |
46 | # look up the correct sequence automatically |
47 | my $sql = q{ |
48 | SELECT trigger_body FROM ALL_TRIGGERS t |
49 | WHERE t.table_name = ? |
50 | AND t.triggering_event = 'INSERT' |
51 | AND t.status = 'ENABLED' |
52 | }; |
53 | |
54 | # trigger_body is a LONG |
55 | $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024); |
56 | |
cb464582 |
57 | my $sth; |
58 | |
59 | # check for fully-qualified name (eg. SCHEMA.TABLENAME) |
60 | if ( my ( $schema, $table ) = $source->name =~ /(\w+)\.(\w+)/ ) { |
61 | $sql = q{ |
62 | SELECT trigger_body FROM ALL_TRIGGERS t |
63 | WHERE t.owner = ? AND t.table_name = ? |
64 | AND t.triggering_event = 'INSERT' |
65 | AND t.status = 'ENABLED' |
66 | }; |
67 | $sth = $dbh->prepare($sql); |
68 | $sth->execute( uc($schema), uc($table) ); |
69 | } |
70 | else { |
71 | $sth = $dbh->prepare($sql); |
72 | $sth->execute( uc( $source->name ) ); |
73 | } |
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74 | while (my ($insert_trigger) = $sth->fetchrow_array) { |
75 | return uc($1) if $insert_trigger =~ m!(\w+)\.nextval!i; # col name goes here??? |
76 | } |
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77 | $self->throw_exception("Unable to find a sequence INSERT trigger on table '" . $source->name . "'."); |
18360aed |
78 | } |
79 | |
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80 | sub _sequence_fetch { |
81 | my ( $self, $type, $seq ) = @_; |
82 | my ($id) = $self->dbh->selectrow_array("SELECT ${seq}.${type} FROM DUAL"); |
83 | return $id; |
84 | } |
85 | |
20f27051 |
86 | =head2 connected |
87 | |
88 | Returns true if we have an open (and working) database connection, false if it is not (yet) |
89 | open (or does not work). (Executes a simple SELECT to make sure it works.) |
90 | |
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91 | The reason this is needed is that L<DBD::Oracle>'s ping() does not do a real |
92 | OCIPing but just gets the server version, which doesn't help if someone killed |
93 | your session. |
94 | |
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95 | =cut |
96 | |
c2481821 |
97 | sub connected { |
98 | my $self = shift; |
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99 | |
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100 | if (not $self->next::method(@_)) { |
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101 | return 0; |
102 | } |
103 | else { |
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104 | my $dbh = $self->_dbh; |
105 | |
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106 | local $dbh->{RaiseError} = 1; |
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107 | |
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108 | eval { |
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109 | my $ping_sth = $dbh->prepare_cached("select 1 from dual"); |
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110 | $ping_sth->execute; |
111 | $ping_sth->finish; |
112 | }; |
113 | |
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114 | return $@ ? 0 : 1; |
c2481821 |
115 | } |
c2481821 |
116 | } |
117 | |
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118 | sub _dbh_execute { |
119 | my $self = shift; |
120 | my ($dbh, $op, $extra_bind, $ident, $bind_attributes, @args) = @_; |
121 | |
122 | my $wantarray = wantarray; |
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123 | |
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124 | my (@res, $exception, $retried); |
125 | |
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126 | RETRY: { |
127 | do { |
128 | eval { |
129 | if ($wantarray) { |
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130 | @res = $self->next::method(@_); |
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131 | } else { |
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132 | $res[0] = $self->next::method(@_); |
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133 | } |
134 | }; |
135 | $exception = $@; |
136 | if ($exception =~ /ORA-01003/) { |
137 | # ORA-01003: no statement parsed (someone changed the table somehow, |
138 | # invalidating your cursor.) |
139 | my ($sql, $bind) = $self->_prep_for_execute($op, $extra_bind, $ident, \@args); |
140 | delete $dbh->{CachedKids}{$sql}; |
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141 | } else { |
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142 | last RETRY; |
d789fa99 |
143 | } |
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144 | } while (not $retried++); |
145 | } |
d789fa99 |
146 | |
147 | $self->throw_exception($exception) if $exception; |
148 | |
149 | wantarray ? @res : $res[0] |
150 | } |
151 | |
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152 | =head2 get_autoinc_seq |
153 | |
154 | Returns the sequence name for an autoincrement column |
155 | |
156 | =cut |
157 | |
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158 | sub get_autoinc_seq { |
159 | my ($self, $source, $col) = @_; |
160 | |
373940e1 |
161 | $self->dbh_do('_dbh_get_autoinc_seq', $source, $col); |
18360aed |
162 | } |
163 | |
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164 | =head2 columns_info_for |
165 | |
166 | This wraps the superclass version of this method to force table |
167 | names to uppercase |
168 | |
169 | =cut |
170 | |
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171 | sub columns_info_for { |
172 | my ($self, $table) = @_; |
173 | |
174 | $self->next::method(uc($table)); |
175 | } |
176 | |
8f7e044c |
177 | =head2 datetime_parser_type |
178 | |
179 | This sets the proper DateTime::Format module for use with |
180 | L<DBIx::Class::InflateColumn::DateTime>. |
181 | |
182 | =cut |
183 | |
184 | sub datetime_parser_type { return "DateTime::Format::Oracle"; } |
185 | |
281719d2 |
186 | sub _svp_begin { |
187 | my ($self, $name) = @_; |
188 | |
189 | $self->dbh->do("SAVEPOINT $name"); |
190 | } |
191 | |
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192 | =head2 source_bind_attributes |
193 | |
194 | Handle LOB types in Oracle. Under a certain size (4k?), you can get away |
195 | with the driver assuming your input is the deprecated LONG type if you |
196 | encode it as a hex string. That ain't gonna fly at larger values, where |
197 | you'll discover you have to do what this does. |
198 | |
199 | This method had to be overridden because we need to set ora_field to the |
200 | actual column, and that isn't passed to the call (provided by Storage) to |
201 | bind_attribute_by_data_type. |
202 | |
203 | According to L<DBD::Oracle>, the ora_field isn't always necessary, but |
204 | adding it doesn't hurt, and will save your bacon if you're modifying a |
205 | table with more than one LOB column. |
206 | |
207 | =cut |
208 | |
209 | sub source_bind_attributes |
210 | { |
211 | my $self = shift; |
212 | my($source) = @_; |
213 | |
214 | my %bind_attributes; |
215 | |
216 | foreach my $column ($source->columns) { |
217 | my $data_type = $source->column_info($column)->{data_type} || ''; |
218 | next unless $data_type; |
219 | |
220 | my %column_bind_attrs = $self->bind_attribute_by_data_type($data_type); |
221 | |
222 | if ($data_type =~ /^[BC]LOB$/i) { |
223 | $column_bind_attrs{'ora_type'} |
224 | = uc($data_type) eq 'CLOB' ? ORA_CLOB : ORA_BLOB; |
225 | $column_bind_attrs{'ora_field'} = $column; |
226 | } |
227 | |
228 | $bind_attributes{$column} = \%column_bind_attrs; |
229 | } |
230 | |
231 | return \%bind_attributes; |
232 | } |
233 | |
281719d2 |
234 | # Oracle automatically releases a savepoint when you start another one with the |
235 | # same name. |
236 | sub _svp_release { 1 } |
237 | |
238 | sub _svp_rollback { |
239 | my ($self, $name) = @_; |
240 | |
241 | $self->dbh->do("ROLLBACK TO SAVEPOINT $name") |
242 | } |
243 | |
18360aed |
244 | =head1 AUTHORS |
245 | |
246 | Andy Grundman <andy@hybridized.org> |
247 | |
248 | Scott Connelly <scottsweep@yahoo.com> |
249 | |
250 | =head1 LICENSE |
251 | |
252 | You may distribute this code under the same terms as Perl itself. |
253 | |
254 | =cut |
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255 | |
256 | 1; |