package DBIx::Class::Storage::DBI::Oracle::Generic;
# -*- mode: cperl; cperl-indent-level: 2 -*-
use strict;
use warnings;
=head1 NAME
DBIx::Class::Storage::DBI::Oracle::Generic - Automatic primary key class for Oracle
=head1 SYNOPSIS
# In your table classes
__PACKAGE__->load_components(qw/PK::Auto Core/);
__PACKAGE__->add_columns({ id => { sequence => 'mysequence', auto_nextval => 1 } });
__PACKAGE__->set_primary_key('id');
__PACKAGE__->sequence('mysequence');
=head1 DESCRIPTION
This class implements autoincrements for Oracle.
=head1 METHODS
=cut
use Carp::Clan qw/^DBIx::Class/;
use base qw/DBIx::Class::Storage::DBI::MultiDistinctEmulation/;
# __PACKAGE__->load_components(qw/PK::Auto/);
sub _dbh_last_insert_id {
my ($self, $dbh, $source, @columns) = @_;
my @ids = ();
foreach my $col (@columns) {
my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col));
my $id = $self->_sequence_fetch( 'currval', $seq );
push @ids, $id;
}
return @ids;
}
sub _dbh_get_autoinc_seq {
my ($self, $dbh, $source, $col) = @_;
# look up the correct sequence automatically
my $sql = q{
SELECT trigger_body FROM ALL_TRIGGERS t
WHERE t.table_name = ?
AND t.triggering_event = 'INSERT'
AND t.status = 'ENABLED'
};
# trigger_body is a LONG
$dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024);
my $sth;
# check for fully-qualified name (eg. SCHEMA.TABLENAME)
if ( my ( $schema, $table ) = $source->name =~ /(\w+)\.(\w+)/ ) {
$sql = q{
SELECT trigger_body FROM ALL_TRIGGERS t
WHERE t.owner = ? AND t.table_name = ?
AND t.triggering_event = 'INSERT'
AND t.status = 'ENABLED'
};
$sth = $dbh->prepare($sql);
$sth->execute( uc($schema), uc($table) );
}
else {
$sth = $dbh->prepare($sql);
$sth->execute( uc( $source->name ) );
}
while (my ($insert_trigger) = $sth->fetchrow_array) {
return uc($1) if $insert_trigger =~ m!(\w+)\.nextval!i; # col name goes here???
}
$self->throw_exception("Unable to find a sequence INSERT trigger on table '" . $source->name . "'.");
}
sub _sequence_fetch {
my ( $self, $type, $seq ) = @_;
my ($id) = $self->dbh->selectrow_array("SELECT ${seq}.${type} FROM DUAL");
return $id;
}
=head2 connected
Returns true if we have an open (and working) database connection, false if it is not (yet)
open (or does not work). (Executes a simple SELECT to make sure it works.)
The reason this is needed is that L<DBD::Oracle>'s ping() does not do a real
OCIPing but just gets the server version, which doesn't help if someone killed
your session.
=cut
sub connected {
my $self = shift;
if (not $self->SUPER::connected(@_)) {
return 0;
}
else {
my $dbh = $self->_dbh;
local $dbh->{RaiseError} = 1;
eval {
my $ping_sth = $dbh->prepare_cached("select 1 from dual");
$ping_sth->execute;
$ping_sth->finish;
};
return $@ ? 0 : 1;
}
}
sub _dbh_execute {
my $self = shift;
my ($dbh, $op, $extra_bind, $ident, $bind_attributes, @args) = @_;
my $wantarray = wantarray;
my (@res, $exception, $retried);
RETRY: {
do {
eval {
if ($wantarray) {
@res = $self->SUPER::_dbh_execute(@_);
} else {
$res[0] = $self->SUPER::_dbh_execute(@_);
}
};
$exception = $@;
if ($exception =~ /ORA-01003/) {
# ORA-01003: no statement parsed (someone changed the table somehow,
# invalidating your cursor.)
my ($sql, $bind) = $self->_prep_for_execute($op, $extra_bind, $ident, \@args);
delete $dbh->{CachedKids}{$sql};
} else {
last RETRY;
}
} while (not $retried++);
}
$self->throw_exception($exception) if $exception;
wantarray ? @res : $res[0]
}
=head2 get_autoinc_seq
Returns the sequence name for an autoincrement column
=cut
sub get_autoinc_seq {
my ($self, $source, $col) = @_;
$self->dbh_do('_dbh_get_autoinc_seq', $source, $col);
}
=head2 columns_info_for
This wraps the superclass version of this method to force table
names to uppercase
=cut
sub columns_info_for {
my ($self, $table) = @_;
$self->next::method(uc($table));
}
=head2 datetime_parser_type
This sets the proper DateTime::Format module for use with
L<DBIx::Class::InflateColumn::DateTime>.
=cut
sub datetime_parser_type { return "DateTime::Format::Oracle"; }
sub _svp_begin {
my ($self, $name) = @_;
$self->dbh->do("SAVEPOINT $name");
}
# Oracle automatically releases a savepoint when you start another one with the
# same name.
sub _svp_release { 1 }
sub _svp_rollback {
my ($self, $name) = @_;
$self->dbh->do("ROLLBACK TO SAVEPOINT $name")
}
=head1 AUTHORS
Andy Grundman <andy@hybridized.org>
Scott Connelly <scottsweep@yahoo.com>
=head1 LICENSE
You may distribute this code under the same terms as Perl itself.
=cut
1;