simple stored function to check parseability of MARCXML blobs

[migration-tools.git] / sql / base / base.sql

diff --git a/sql/base/base.sql b/sql/base/base.sql
index 9e157f9..deeaa3c 100644 (file)
--- a/sql/base/base.sql
+++ b/sql/base/base.sql
@@ -1,3 +1,19 @@
+-- Copyright 2009-2012, Equinox Software, Inc.
+--
+-- This program is free software; you can redistribute it and/or
+-- modify it under the terms of the GNU General Public License
+-- as published by the Free Software Foundation; either version 2
+-- of the License, or (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program; if not, write to the Free Software
+-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
 --------------------------------------------------------------------------
 -- An example of how to use:
 -- 
@@ -1609,4 +1625,23 @@ END;
 
 $$ LANGUAGE plpgsql;
 
+CREATE OR REPLACE FUNCTION migration_tools.marc_parses( TEXT ) RETURNS BOOLEAN AS $func$
+
+use MARC::Record;
+use MARC::File::XML (BinaryEncoding => 'UTF-8');
+use MARC::Charset;
+
+MARC::Charset->assume_unicode(1);
+
+my $xml = shift;
+
+eval { my $r = MARC::Record->new_from_xml( $xml ); };
+if ($@) {
+    return 0;
+} else {
+    return 1;
+}
+
+$func$ LANGUAGE PLPERLU;
+COMMENT ON FUNCTION migration_tools.marc_parses(TEXT) IS 'Return boolean indicating if MARCXML string is parseable by MARC::File::XML';