Index: openacs-4/packages/acs-kernel/sql/oracle/upgrade/upgrade-5.6.0d3-5.6.0d4.sql
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-kernel/sql/oracle/upgrade/upgrade-5.6.0d3-5.6.0d4.sql,v
diff -u -N -r1.4 -r1.5
--- openacs-4/packages/acs-kernel/sql/oracle/upgrade/upgrade-5.6.0d3-5.6.0d4.sql	10 Mar 2010 00:34:58 -0000	1.4
+++ openacs-4/packages/acs-kernel/sql/oracle/upgrade/upgrade-5.6.0d3-5.6.0d4.sql	23 Mar 2010 16:21:05 -0000	1.5
@@ -1,3 +1,9 @@
+alter table acs_data_links add relation_tag varchar2(100);
+create index acs_data_links_rel_tag_idx on acs_data_links (relation_tag);
+alter table acs_data_links drop constraint acs_data_links_un;
+alter table acs_data_links add constraint acs_data_links_un unique 
+  (object_id_one, object_id_two, relation_tag);
+
 alter table apm_package_dependencies drop constraint apm_package_deps_type_ck;
 alter table apm_package_dependencies add
   constraint apm_package_deps_type_ck
