text: CREATE OR REPLACE FUNCTION m_installer_setup()
      RETURNS TEXT
      LANGUAGE 'plpython3u'
  
      COST 100
      VOLATILE
  AS $BODY$
      # -- ==========================================================
      # --    Installer
  
      # --    Copyright 2019 LEE DONG GUN(2019.12.28)
      # -- ==========================================================
  
      from postgresql_extension_installer import Installer
  
      installer = Installer(plpy)
      return "ok"
  $BODY$;
  SELECT m_installer_setup();
  select m_installer_update('me.faena.postgresql_extension_installer');
  select m_installer_uninstall('me.faena.postgresql_extension_installer');
  select m_installer_pylib_update('me.faena.postgresql_extension_installer');
  select m_installer_delete_cache();
  select m_installer_install('https://raw.githubusercontent.com/Sotaneum/PostgreSQL-Extension-Installer/beta/tests/test.query')