Steps to copy heroku database to local database:
1. Run copy process in terminal:
heroku pg:pull DATABASE_URL change_to_your_data_base_name --app change_to_your_app_name
2. Change db owner using this query:
GRANT ALL PRIVILEGES ON DATABASE change_to_your_data_base_name to change_to_your_user;
ALTER DATABASE change_to_your_data_base_name OWNER TO change_to_your_user;
3. Generate and run query for all tables in you database:
SELECT 'ALTER TABLE '|| schemaname || '.' || tablename ||' OWNER TO change_to_your_user;'
FROM pg_tables WHERE NOT schemaname IN ('pg_catalog', 'information_schema')
ORDER BY schemaname, tablename;