diff --git a/schema/pgsql-migrations/upgrade_77.sql b/schema/pgsql-migrations/upgrade_77.sql
new file mode 100644
index 00000000..de101216
--- /dev/null
+++ b/schema/pgsql-migrations/upgrade_77.sql
@@ -0,0 +1,72 @@
+ALTER TYPE enum_merge_behaviour ADD VALUE 'override';
+
+
+CREATE TABLE icinga_notification_states_set (
+  notification_id integer NOT NULL,
+  property enum_state_name NOT NULL,
+  merge_behaviour enum_merge_behaviour NOT NULL DEFAULT 'override',
+  PRIMARY KEY (notification_id, property, merge_behaviour),
+  CONSTRAINT icinga_notification_states_set_notification
+    FOREIGN KEY (notification_id)
+    REFERENCES icinga_notification (id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE
+);
+
+COMMENT ON COLUMN icinga_notification_states_set.merge_behaviour IS 'override: = [], extend: += [], blacklist: -= []';
+
+
+CREATE TABLE icinga_notification_types_set (
+  notification_id integer NOT NULL,
+  property enum_type_name NOT NULL,
+  merge_behaviour enum_merge_behaviour NOT NULL DEFAULT 'override',
+  PRIMARY KEY (notification_id, property, merge_behaviour),
+  CONSTRAINT icinga_notification_types_set_notification
+    FOREIGN KEY (notification_id)
+    REFERENCES icinga_notification (id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE
+);
+
+COMMENT ON COLUMN icinga_notification_types_set.merge_behaviour IS 'override: = [], extend: += [], blacklist: -= []';
+
+
+CREATE TABLE icinga_notification_var (
+  notification_id integer NOT NULL,
+  varname VARCHAR(255) DEFAULT NULL,
+  varvalue TEXT DEFAULT NULL,
+  format enum_property_format,
+  PRIMARY KEY (notification_id, varname),
+  CONSTRAINT icinga_notification_var_notification
+    FOREIGN KEY (notification_id)
+    REFERENCES icinga_notification (id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE
+);
+
+CREATE UNIQUE INDEX notification_var_search_idx ON icinga_notification_var (varname);
+
+
+CREATE TABLE icinga_notification_inheritance (
+  notification_id integer NOT NULL,
+  parent_notification_id integer NOT NULL,
+  weight integer DEFAULT NULL,
+  PRIMARY KEY (notification_id, parent_notification_id),
+  CONSTRAINT icinga_notification_inheritance_notification
+  FOREIGN KEY (notification_id)
+  REFERENCES icinga_notification (id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE,
+  CONSTRAINT icinga_notification_inheritance_parent_notification
+  FOREIGN KEY (parent_notification_id)
+  REFERENCES icinga_notification (id)
+    ON DELETE RESTRICT
+    ON UPDATE CASCADE
+);
+
+CREATE UNIQUE INDEX notification_inheritance ON icinga_notification_inheritance (notification_id, weight);
+
+
+INSERT INTO director_schema_migration
+  (schema_version, migration_time)
+  VALUES (77, NOW());
diff --git a/schema/pgsql.sql b/schema/pgsql.sql
index 9b3cd398..c5f524ac 100644
--- a/schema/pgsql.sql
+++ b/schema/pgsql.sql
@@ -19,7 +19,7 @@ CREATE TYPE enum_property_format AS ENUM('string', 'expression', 'json');
 CREATE TYPE enum_object_type_all AS ENUM('object', 'template', 'apply', 'external_object'); -- TODO: can we check for an invalid
 CREATE TYPE enum_object_type AS ENUM('object', 'template', 'external_object');
 CREATE TYPE enum_timeperiod_range_type AS ENUM('include', 'exclude');
-CREATE TYPE enum_merge_behaviour AS ENUM('set', 'add', 'substract');
+CREATE TYPE enum_merge_behaviour AS ENUM('set', 'add', 'substract', 'override');
 CREATE TYPE enum_command_object_type AS ENUM('object', 'template', 'external_object');
 CREATE TYPE enum_apply_object_type AS ENUM('object', 'template', 'apply', 'external_object');
 CREATE TYPE enum_state_name AS ENUM('OK', 'Warning', 'Critical', 'Unknown', 'Up', 'Down');
@@ -1322,7 +1322,73 @@ CREATE TABLE sync_run (
 );
 
 
+CREATE TABLE icinga_notification_states_set (
+  notification_id integer NOT NULL,
+  property enum_state_name NOT NULL,
+  merge_behaviour enum_merge_behaviour NOT NULL DEFAULT 'override',
+  PRIMARY KEY (notification_id, property, merge_behaviour),
+  CONSTRAINT icinga_notification_states_set_notification
+  FOREIGN KEY (notification_id)
+  REFERENCES icinga_notification (id)
+  ON DELETE CASCADE
+  ON UPDATE CASCADE
+);
+
+COMMENT ON COLUMN icinga_notification_states_set.merge_behaviour IS 'override: = [], extend: += [], blacklist: -= []';
+
+
+CREATE TABLE icinga_notification_types_set (
+  notification_id integer NOT NULL,
+  property enum_type_name NOT NULL,
+  merge_behaviour enum_merge_behaviour NOT NULL DEFAULT 'override',
+  PRIMARY KEY (notification_id, property, merge_behaviour),
+  CONSTRAINT icinga_notification_types_set_notification
+  FOREIGN KEY (notification_id)
+  REFERENCES icinga_notification (id)
+  ON DELETE CASCADE
+  ON UPDATE CASCADE
+);
+
+COMMENT ON COLUMN icinga_notification_types_set.merge_behaviour IS 'override: = [], extend: += [], blacklist: -= []';
+
+
+CREATE TABLE icinga_notification_var (
+  notification_id integer NOT NULL,
+  varname VARCHAR(255) DEFAULT NULL,
+  varvalue TEXT DEFAULT NULL,
+  format enum_property_format,
+  PRIMARY KEY (notification_id, varname),
+  CONSTRAINT icinga_notification_var_notification
+  FOREIGN KEY (notification_id)
+  REFERENCES icinga_notification (id)
+  ON DELETE CASCADE
+  ON UPDATE CASCADE
+);
+
+CREATE UNIQUE INDEX notification_var_search_idx ON icinga_notification_var (varname);
+
+
+CREATE TABLE icinga_notification_inheritance (
+  notification_id integer NOT NULL,
+  parent_notification_id integer NOT NULL,
+  weight integer DEFAULT NULL,
+  PRIMARY KEY (notification_id, parent_notification_id),
+  CONSTRAINT icinga_notification_inheritance_notification
+  FOREIGN KEY (notification_id)
+  REFERENCES icinga_notification (id)
+  ON DELETE CASCADE
+  ON UPDATE CASCADE,
+  CONSTRAINT icinga_notification_inheritance_parent_notification
+  FOREIGN KEY (parent_notification_id)
+  REFERENCES icinga_notification (id)
+  ON DELETE RESTRICT
+  ON UPDATE CASCADE
+);
+
+CREATE UNIQUE INDEX notification_inheritance ON icinga_notification_inheritance (notification_id, weight);
+
+
 -- set current schema version
 INSERT INTO director_schema_migration
   (schema_version, migration_time)
-  VALUES (76, NOW());
+  VALUES (77, NOW());