use strict;
use warnings;
+use Scope::Guard ();
+use Context::Preserve ();
=head1 NAME
=head1 SYNOPSIS
- # In your table classes
- __PACKAGE__->load_components(qw/PK::Auto Core/);
+ # In your result (table) classes
+ use base 'DBIx::Class::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.
+This class implements base Oracle support. The subclass
+L<DBIx::Class::Storage::DBI::Oracle::WhereJoins> is for C<(+)> joins in Oracle
+versions before 9.
=head1 METHODS
use base qw/DBIx::Class::Storage::DBI/;
use mro 'c3';
-# For ORA_BLOB => 113, ORA_CLOB => 112
-use DBD::Oracle qw( :ora_types );
-
sub _dbh_last_insert_id {
my ($self, $dbh, $source, @columns) = @_;
my @ids = ();
my $sth;
+ my $source_name;
+ if ( ref $source->name ne 'SCALAR' ) {
+ $source_name = $source->name;
+ }
+ else {
+ $source_name = ${$source->name};
+ }
+
# check for fully-qualified name (eg. SCHEMA.TABLENAME)
- if ( my ( $schema, $table ) = $source->name =~ /(\w+)\.(\w+)/ ) {
+ if ( my ( $schema, $table ) = $source_name =~ /(\w+)\.(\w+)/ ) {
$sql = q{
SELECT trigger_body FROM ALL_TRIGGERS t
WHERE t.owner = ? AND t.table_name = ?
}
else {
$sth = $dbh->prepare($sql);
- $sth->execute( uc( $source->name ) );
+ $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???
my $timestamp_tz_format = $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||=
'YYYY-MM-DD HH24:MI:SS.FF TZHTZM';
- $self->_do_query("alter session set nls_date_format = '$date_format'");
$self->_do_query(
-"alter session set nls_timestamp_format = '$timestamp_format'");
+ "alter session set nls_date_format = '$date_format'"
+ );
$self->_do_query(
-"alter session set nls_timestamp_tz_format='$timestamp_tz_format'");
-}
-
-sub _svp_begin {
- my ($self, $name) = @_;
-
- $self->_get_dbh->do("SAVEPOINT $name");
+ "alter session set nls_timestamp_format = '$timestamp_format'"
+ );
+ $self->_do_query(
+ "alter session set nls_timestamp_tz_format='$timestamp_tz_format'"
+ );
}
=head2 source_bind_attributes
=cut
-sub source_bind_attributes
+sub source_bind_attributes
{
- my $self = shift;
- my($source) = @_;
+ require DBD::Oracle;
+ my $self = shift;
+ my($source) = @_;
- my %bind_attributes;
+ my %bind_attributes;
- foreach my $column ($source->columns) {
- my $data_type = $source->column_info($column)->{data_type} || '';
- next unless $data_type;
+ foreach my $column ($source->columns) {
+ my $data_type = $source->column_info($column)->{data_type} || '';
+ next unless $data_type;
- my %column_bind_attrs = $self->bind_attribute_by_data_type($data_type);
+ my %column_bind_attrs = $self->bind_attribute_by_data_type($data_type);
- if ($data_type =~ /^[BC]LOB$/i) {
- $column_bind_attrs{'ora_type'}
- = uc($data_type) eq 'CLOB' ? ORA_CLOB : ORA_BLOB;
- $column_bind_attrs{'ora_field'} = $column;
- }
+ if ($data_type =~ /^[BC]LOB$/i) {
+ if ($DBD::Oracle::VERSION eq '1.23') {
+ $self->throw_exception(
+"BLOB/CLOB support in DBD::Oracle == 1.23 is broken, use an earlier or later ".
+"version.\n\nSee: https://rt.cpan.org/Public/Bug/Display.html?id=46016\n"
+ );
+ }
+
+ $column_bind_attrs{'ora_type'} = uc($data_type) eq 'CLOB'
+ ? DBD::Oracle::ORA_CLOB()
+ : DBD::Oracle::ORA_BLOB()
+ ;
+ $column_bind_attrs{'ora_field'} = $column;
+ }
+
+ $bind_attributes{$column} = \%column_bind_attrs;
+ }
- $bind_attributes{$column} = \%column_bind_attrs;
- }
+ return \%bind_attributes;
+}
- return \%bind_attributes;
+sub _svp_begin {
+ my ($self, $name) = @_;
+ $self->_get_dbh->do("SAVEPOINT $name");
}
# Oracle automatically releases a savepoint when you start another one with the
sub _svp_release { 1 }
sub _svp_rollback {
- my ($self, $name) = @_;
+ my ($self, $name) = @_;
+ $self->_get_dbh->do("ROLLBACK TO SAVEPOINT $name")
+}
+
+=head2 relname_to_table_alias
+
+L<DBIx::Class> uses L<DBIx::Class::Relationship> names as table aliases in
+queries.
+
+Unfortunately, Oracle doesn't support identifiers over 30 chars in length, so
+the L<DBIx::Class::Relationship> name is shortened and appended with half of an
+MD5 hash.
+
+See L<DBIx::Class::Storage/"relname_to_table_alias">.
+
+=cut
+
+sub relname_to_table_alias {
+ my $self = shift;
+ my ($relname, $join_count) = @_;
+
+ my $alias = $self->next::method(@_);
+
+ return $alias if length($alias) <= 30;
+
+ # get a base64 md5 of the alias with join_count
+ require Digest::MD5;
+ my $ctx = Digest::MD5->new;
+ $ctx->add($alias);
+ my $md5 = $ctx->b64digest;
+
+ # remove alignment mark just in case
+ $md5 =~ s/=*\z//;
+
+ # truncate and prepend to truncated relname without vowels
+ (my $devoweled = $relname) =~ s/[aeiou]//g;
+ my $shortened = substr($devoweled, 0, 18);
+
+ my $new_alias =
+ $shortened . '_' . substr($md5, 0, 30 - length($shortened) - 1);
+
+ return $new_alias;
+}
+
+=head2 with_deferred_fk_checks
+
+Runs a coderef between:
+
+ alter session set constraints = deferred
+ ...
+ alter session set constraints = immediate
+
+to defer foreign key checks.
+
+Constraints must be declared C<DEFERRABLE> for this to work.
+
+=cut
+
+sub with_deferred_fk_checks {
+ my ($self, $sub) = @_;
+
+ my $txn_scope_guard = $self->txn_scope_guard;
+
+ $self->_do_query('alter session set constraints = deferred');
+
+ my $sg = Scope::Guard->new(sub {
+ $self->_do_query('alter session set constraints = immediate');
+ });
- $self->_get_dbh->do("ROLLBACK TO SAVEPOINT $name")
+ return Context::Preserve::preserve_context(sub { $sub->() },
+ after => sub { $txn_scope_guard->commit });
}
=head1 AUTHOR
projects / dbsrgits/DBIx-Class.git / blobdiff