1 package DBIx::Class::Storage::DBI::Oracle::Generic;
8 DBIx::Class::Storage::DBI::Oracle::Generic - Automatic primary key class for Oracle
12 # In your table classes
13 __PACKAGE__->load_components(qw/PK::Auto Core/);
14 __PACKAGE__->add_columns({ id => { sequence => 'mysequence', auto_nextval => 1 } });
15 __PACKAGE__->set_primary_key('id');
16 __PACKAGE__->sequence('mysequence');
20 This class implements autoincrements for Oracle.
26 use base qw/DBIx::Class::Storage::DBI/;
27 use Carp::Clan qw/^DBIx::Class/;
29 # For ORA_BLOB => 113, ORA_CLOB => 112
30 use DBD::Oracle qw( :ora_types );
32 sub _dbh_last_insert_id {
33 my ($self, $dbh, $source, @columns) = @_;
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', $seq );
43 sub _dbh_get_autoinc_seq {
44 my ($self, $dbh, $source, $col) = @_;
46 # look up the correct sequence automatically
48 SELECT trigger_body FROM ALL_TRIGGERS t
49 WHERE t.table_name = ?
50 AND t.triggering_event = 'INSERT'
51 AND t.status = 'ENABLED'
54 # trigger_body is a LONG
55 $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024);
59 # check for fully-qualified name (eg. SCHEMA.TABLENAME)
60 if ( my ( $schema, $table ) = $source->name =~ /(\w+)\.(\w+)/ ) {
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'
67 $sth = $dbh->prepare($sql);
68 $sth->execute( uc($schema), uc($table) );
71 $sth = $dbh->prepare($sql);
72 $sth->execute( uc( $source->name ) );
74 while (my ($insert_trigger) = $sth->fetchrow_array) {
75 return uc($1) if $insert_trigger =~ m!(\w+)\.nextval!i; # col name goes here???
77 $self->throw_exception("Unable to find a sequence INSERT trigger on table '" . $source->name . "'.");
81 my ( $self, $type, $seq ) = @_;
82 my ($id) = $self->dbh->selectrow_array("SELECT ${seq}.${type} FROM DUAL");
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.)
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
100 if (not $self->next::method(@_)) {
104 my $dbh = $self->_dbh;
106 local $dbh->{RaiseError} = 1;
109 my $ping_sth = $dbh->prepare_cached("select 1 from dual");
120 my ($dbh, $op, $extra_bind, $ident, $bind_attributes, @args) = @_;
122 my $wantarray = wantarray;
124 my (@res, $exception, $retried);
130 @res = $self->next::method(@_);
132 $res[0] = $self->next::method(@_);
136 if ($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};
144 } while (not $retried++);
147 $self->throw_exception($exception) if $exception;
149 wantarray ? @res : $res[0]
152 =head2 get_autoinc_seq
154 Returns the sequence name for an autoincrement column
158 sub get_autoinc_seq {
159 my ($self, $source, $col) = @_;
161 $self->dbh_do('_dbh_get_autoinc_seq', $source, $col);
164 =head2 columns_info_for
166 This wraps the superclass version of this method to force table
171 sub columns_info_for {
172 my ($self, $table) = @_;
174 $self->next::method(uc($table));
177 =head2 datetime_parser_type
179 This sets the proper DateTime::Format module for use with
180 L<DBIx::Class::InflateColumn::DateTime>.
184 sub datetime_parser_type { return "DateTime::Format::Oracle"; }
187 my ($self, $name) = @_;
189 $self->dbh->do("SAVEPOINT $name");
192 =head2 source_bind_attributes
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.
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.
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.
209 sub source_bind_attributes
216 foreach my $column ($source->columns) {
217 my $data_type = $source->column_info($column)->{data_type} || '';
218 next unless $data_type;
220 my %column_bind_attrs = $self->bind_attribute_by_data_type($data_type);
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;
228 $bind_attributes{$column} = \%column_bind_attrs;
231 return \%bind_attributes;
234 # Oracle automatically releases a savepoint when you start another one with the
236 sub _svp_release { 1 }
239 my ($self, $name) = @_;
241 $self->dbh->do("ROLLBACK TO SAVEPOINT $name")
246 Andy Grundman <andy@hybridized.org>
248 Scott Connelly <scottsweep@yahoo.com>
252 You may distribute this code under the same terms as Perl itself.