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"; }
186 =head2 connect_call_set_datetime_format
190 on_connect_call => 'set_datetime_format'
192 In L<DBIx::Class::Storage::DBI/connect_info> to set the session nls date,
193 and timestamp values for use with
194 L<DBIx::Class::InflateColumn::DateTime>. As well as the necessary environment
195 variables for L<DateTime::Format::Oracle>.
197 Maximum allowable precision is used.
199 C<nls_timestamp_tz_format> is also initialized but is not currently used by
200 L<DBIx::Class::InflateColumn::DateTime>.
204 sub connect_call_set_datetime_format {
206 my $dbh = $self->dbh;
208 my $date_format = $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS';
209 my $timestamp_format = $ENV{NLS_TIMESTAMP_FORMAT} ||=
210 'YYYY-MM-DD HH24:MI:SS.FF';
211 my $timestamp_tz_format = $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||=
212 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM';
214 $dbh->do("alter session set nls_date_format = '$date_format'");
215 $dbh->do("alter session set nls_timestamp_format = '$timestamp_format'");
216 $dbh->do("alter session set nls_timestamp_tz_format = '$timestamp_tz_format'");
220 my ($self, $name) = @_;
222 $self->dbh->do("SAVEPOINT $name");
225 =head2 source_bind_attributes
227 Handle LOB types in Oracle. Under a certain size (4k?), you can get away
228 with the driver assuming your input is the deprecated LONG type if you
229 encode it as a hex string. That ain't gonna fly at larger values, where
230 you'll discover you have to do what this does.
232 This method had to be overridden because we need to set ora_field to the
233 actual column, and that isn't passed to the call (provided by Storage) to
234 bind_attribute_by_data_type.
236 According to L<DBD::Oracle>, the ora_field isn't always necessary, but
237 adding it doesn't hurt, and will save your bacon if you're modifying a
238 table with more than one LOB column.
242 sub source_bind_attributes
249 foreach my $column ($source->columns) {
250 my $data_type = $source->column_info($column)->{data_type} || '';
251 next unless $data_type;
253 my %column_bind_attrs = $self->bind_attribute_by_data_type($data_type);
255 if ($data_type =~ /^[BC]LOB$/i) {
256 $column_bind_attrs{'ora_type'}
257 = uc($data_type) eq 'CLOB' ? ORA_CLOB : ORA_BLOB;
258 $column_bind_attrs{'ora_field'} = $column;
261 $bind_attributes{$column} = \%column_bind_attrs;
264 return \%bind_attributes;
267 # Oracle automatically releases a savepoint when you start another one with the
269 sub _svp_release { 1 }
272 my ($self, $name) = @_;
274 $self->dbh->do("ROLLBACK TO SAVEPOINT $name")
279 Andy Grundman <andy@hybridized.org>
281 Scott Connelly <scottsweep@yahoo.com>
285 You may distribute this code under the same terms as Perl itself.