Index: openacs-4/packages/acs-kernel/sql/postgresql/acs-relationships-create.sql
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-kernel/sql/postgresql/acs-relationships-create.sql,v
diff -u -r1.29 -r1.30
--- openacs-4/packages/acs-kernel/sql/postgresql/acs-relationships-create.sql	5 Jan 2010 15:30:26 -0000	1.29
+++ openacs-4/packages/acs-kernel/sql/postgresql/acs-relationships-create.sql	6 Jan 2010 20:07:24 -0000	1.30
@@ -378,16 +378,15 @@
                         constraint acs_data_links_obj_two_fk
                         references acs_objects (object_id)
                         on delete cascade,
-        relation_tag    varchar(100)
+        relation_tag    varchar(100),
+        constraint acs_data_links_un unique
+        (object_id_one, object_id_two, relation_tag)
 );
 
 create index acs_data_links_id_one_idx on acs_data_links (object_id_one);
 create index acs_data_links_id_two_idx on acs_data_links (object_id_two);
 create index acs_data_links_rel_tag_idx on acs_data_links (relation_tag);
 
-create unique index acs_data_links_un on acs_data_links (
-  object_id_one, object_id_two, relation_tag
-);
 
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 -- TRIGGERS --