Symbology triggers errors about qgep HOT 1 CLOSED

-- Otherwise this will result in very slow query due to on_structure_part_change_networkelement
-- being triggered for all rows. See https://github.com/QGEP/datamodel/pull/166#issuecomment-760245405
IF _all THEN
  RAISE INFO 'Temporarily disabling symbology triggers';
  PERFORM qgep_sys.drop_symbology_triggers();
END IF;

-- See above
IF _all THEN
  RAISE INFO 'Reenabling symbology triggers';
  PERFORM qgep_sys.create_symbology_triggers();
END IF;