CREATE OR REPLACE FUNCTION inheritance_with_pathman() RETURNS SETOF text
AS $$
BEGIN
 CREATE TABLE records(
 id SERIAL PRIMARY KEY,
 time TIMESTAMPTZ NOT NULL,
 state text
 );
 CREATE TABLE records_open() INHERITS (records);
 CREATE TABLE records_archive() INHERITS (records);
 PERFORM create_range_partitions('public.records_archive', 'time', now(), '1 day'::INTERVAL, 1);
 INSERT INTO records_archive(time, state) VALUES(now(), 'archived');
 RETURN NEXT (select count(*) FROM records_archive);
 RETURN NEXT (select count(*) FROM records);
END $$ LANGUAGE 'plpgsql';

select inheritance_with_pathman();
 inheritance_with_pathman 
----------------------------------------
 1
 2

CREATE OR REPLACE FUNCTION inheritance_without_patman() RETURNS SETOF text
AS $$
BEGIN
 CREATE TABLE records(
 id SERIAL PRIMARY KEY,
 time TIMESTAMPTZ NOT NULL,
 state text
 );
 CREATE TABLE records_open() INHERITS (records);
 CREATE TABLE records_archive() INHERITS (records);
 CREATE TABLE records_archive_old() INHERITS (records_archive);
 INSERT INTO records_archive_old(time, state) VALUES(now(), 'archived');
 RETURN NEXT (select count(*) FROM records_archive);
 RETURN NEXT (select count(*) FROM records);
END $$ LANGUAGE 'plpgsql';

select inheritance_without_patman();
 inheritance_without_patman 
----------------------------------------
 1
 1

 extname | extowner | extnamespace | extrelocatable | extversion | extconfig | extcondition 
--------------------+----------+--------------+----------------+------------+-----------------+--------------
 plpgsql | 10 | 11 | f | 1.0 | | 
 pgcrypto | 16388 | 2200 | t | 1.2 | | 
 pg_stat_statements | 16388 | 2200 | t | 1.3 | | 
 pg_pathman | 16388 | 2200 | f | 1.4 | {355267,355278} | {"",""}
 uuid-ossp | 16388 | 2200 | t | 1.0 | | 
PostgreSQL 9.5.10 on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 6.3.0-12ubuntu2) 6.3.0 20170406, 64-bit
get_pathman_lib_version 
-------------------------
 10409