$$ LANGUAGE plpgsql;
-CREATE OR REPLACE FUNCTION migration_tools.insert_856_9 (TEXT, TEXT) RETURNS TEXT AS $$
+CREATE OR REPLACE FUNCTION migration_tools.insert_856_9_conditional (TEXT, TEXT) RETURNS TEXT AS $$
## USAGE: UPDATE biblio.record_entry SET marc = migration_tools.insert_856_9(marc, 'ABC') WHERE [...];
$$ LANGUAGE PLPERLU STABLE;
+CREATE OR REPLACE FUNCTION migration_tools.insert_856_9 (TEXT, TEXT) RETURNS TEXT AS $$
+
+ ## USAGE: UPDATE biblio.record_entry SET marc = migration_tools.insert_856_9(marc, 'ABC') WHERE [...];
+
+ my ($marcxml, $shortname) = @_;
+
+ use MARC::Record;
+ use MARC::File::XML;
+
+ my $xml = $marcxml;
+
+ eval {
+ my $marc = MARC::Record->new_from_xml($marcxml, 'UTF-8');
+
+ foreach my $field ( $marc->field('856') ) {
+ if ( ! $field->as_string('9') ) {
+ $field->add_subfields( '9' => $shortname );
+ }
+ }
+
+ $xml = $marc->as_xml_record;
+ $xml =~ s/^<\?.+?\?>$//mo;
+ $xml =~ s/\n//sgo;
+ $xml =~ s/>\s+</></sgo;
+ };
+
+ return $xml;
+
+$$ LANGUAGE PLPERLU STABLE;
+
+
CREATE OR REPLACE FUNCTION migration_tools.change_call_number(copy_id BIGINT, new_label TEXT, cn_class BIGINT) RETURNS VOID AS $$
DECLARE