diff --git a/dba/patches/1.2.2.sql b/dba/patches/1.2.2.sql
new file mode 100644
index 00000000..2c9e9ea7
--- /dev/null
+++ b/dba/patches/1.2.2.sql
@@ -0,0 +1,70 @@
+
+-- This database update provides new tables for the Principal, for
+-- a consistent dav_resource which a principal, collection or calendar_item
+-- all inherit from.
+
+BEGIN;
+SELECT check_db_revision(1,2,1);
+
+-- Only needs SELECT access by website.
+CREATE TABLE principal_type (
+  principal_type_id SERIAL PRIMARY KEY,
+  principal_type_desc TEXT
+);
+
+-- web needs SELECT,INSERT,UPDATE,DELETE
+CREATE TABLE principal (
+  principal_id SERIAL PRIMARY KEY,
+  type_id INT8 NOT NULL REFERENCES principal_type(principal_type_id),
+  user_no INT8 NULL REFERENCES usr(user_no),
+  displayname TEXT,
+  active BOOLEAN
+);
+
+-- Allowing identification of group members.
+CREATE TABLE group_member (
+  group_id INT8 REFERENCES principal(principal_id),
+  member_id INT8 REFERENCES principal(principal_id)
+);
+CREATE UNIQUE INDEX group_member_pk ON group_member(group_id,member_id);
+CREATE INDEX group_member_sk ON group_member(member_id);
+
+
+-- Only needs SELECT access by website. dav_resource_type will be 'principal', 'collection', 'CalDAV:calendar' and so forth.
+CREATE TABLE dav_resource_type (
+  resource_type_id SERIAL PRIMARY KEY,
+  dav_resource_type TEXT,
+  resource_type_desc TEXT
+);
+
+CREATE TABLE dav_resource (
+  dav_id INT8 PRIMARY KEY DEFAULT nextval('dav_id_seq'),
+  dav_name TEXT,
+  resource_type_id INT8 REFERENCES dav_resource_type(resource_type_id),
+  owner_id INT8 REFERENCES principal(principal_id)
+);
+
+
+CREATE TABLE privilege (
+  granted_to_id INT8 REFERENCES principal(principal_id),
+  resource_id INT8 REFERENCES dav_resource(dav_id),
+  granted_by_id INT8 REFERENCES principal(principal_id),
+  can_read BOOLEAN,
+  can_write BOOLEAN,
+  can_write_properties BOOLEAN,
+  can_write_content BOOLEAN,
+  can_unlock BOOLEAN,
+  can_read_acl BOOLEAN,
+  can_read_current_user_privilege_set BOOLEAN,
+  can_write_acl BOOLEAN,
+  can_bind BOOLEAN,
+  can_unbind BOOLEAN,
+  can_read_free_busy BOOLEAN,
+  PRIMARY KEY (granted_to_id, resource_id)
+);
+
+SELECT new_db_revision(1,2,2, 'Fevrier' );
+
+COMMIT;
+ROLLBACK;
+