Index: openacs-4/packages/acs-content-repository/sql/postgresql/content-create.sql
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-content-repository/sql/postgresql/content-create.sql,v
diff -u -r1.64 -r1.65
--- openacs-4/packages/acs-content-repository/sql/postgresql/content-create.sql	7 Aug 2017 23:47:47 -0000	1.64
+++ openacs-4/packages/acs-content-repository/sql/postgresql/content-create.sql	21 Feb 2018 14:11:08 -0000	1.65
@@ -716,7 +716,7 @@
                  constraint cr_revision_attributes_pk
                  primary key
                  constraint cr_revision_attributes_fk
-                 references cr_revisions,
+                 references cr_revisions on delete cascade,
   attributes     text
 );
 
Index: openacs-4/packages/acs-content-repository/sql/postgresql/content-image.sql
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-content-repository/sql/postgresql/content-image.sql,v
diff -u -r1.19 -r1.20
--- openacs-4/packages/acs-content-repository/sql/postgresql/content-image.sql	7 Aug 2017 23:47:47 -0000	1.19
+++ openacs-4/packages/acs-content-repository/sql/postgresql/content-image.sql	21 Feb 2018 14:11:08 -0000	1.20
@@ -15,7 +15,7 @@
 create table images (
    image_id       integer
                   constraint images_image_id_fk
-                  references cr_revisions
+                  references cr_revisions on delete cascade
                   constraint images_image_id_pk
                   primary key,
    width          integer,