docs: def get_minor_version(module_ident, plpy):
      """Retrieve minor version only given module_ident."""
      # Make sure to always return the max minor version that is already in the
      # database, in case the given module_ident is not the latest version
      plan = plpy.prepare('''\
          WITH t AS (
              SELECT uuid, major_version
                  FROM modules
                  WHERE module_ident = $1
          )
          SELECT MAX(m.minor_version) AS minor_version
              FROM modules m, t
              WHERE m.uuid = t.uuid AND m.major_version = t.major_version
          ''', ('integer',))
      results = plpy.execute(plan, (module_ident,), 1)
      return results[0]['minor_version']