diff --git a/27a69a5_to_aad2e07.sql b/27a69a5_to_aad2e07.sql
new file mode 100644
index 0000000..74250e2
--- /dev/null
+++ b/27a69a5_to_aad2e07.sql
@@ -0,0 +1,44 @@
+set check_function_bodies = off;
+
+CREATE OR REPLACE FUNCTION public.unset_acting_usr()
+ RETURNS void
+ LANGUAGE plpgsql
+AS $function$
+begin
+  perform set_config('dnim.usr_uid', '', false);
+end;
+$function$
+;
+
+CREATE OR REPLACE FUNCTION public.get_acting_usr()
+ RETURNS usr
+ LANGUAGE plpgsql
+AS $function$
+declare
+  acting_usr public.usr;
+begin
+  if nullif(current_setting('dnim.usr_uid', true), '') is null then
+    acting_usr := public.usr_root();
+  else
+    select u.*
+    from public.usr u
+    where u.uid = human_uuid.huid_of_string(current_setting('dnim.usr_uid', true))
+    into acting_usr;
+  end if;
+
+  return coalesce(acting_usr, public.usr_root());
+end;
+$function$
+;
+
+CREATE OR REPLACE FUNCTION public.set_acting_usr(uid text)
+ RETURNS void
+ LANGUAGE plpgsql
+AS $function$
+begin
+  if uid is not null and uid != '' then
+    perform set_config('dnim.usr_uid', uid, false);
+  end if;
+end;
+$function$
+;
diff --git a/885e22c_to_27a69a5.sql b/885e22c_to_27a69a5.sql
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/885e22c_to_27a69a5.sql
@@ -0,0 +1 @@
+