IFNULL( ( SELECT VALUE FROM wl_equipment_specific_index wesi WHERE wesi.equipment_specific_id = wes.id AND equipment_index_key = 'FHS_FirePoolDevice_WaterFlow' ), '--' ) AS nowFlow,
IFNULL( ( SELECT VALUE FROM wl_equipment_specific_index wesi WHERE wesi.equipment_specific_id = wes.id AND equipment_index_key = 'FHS_FirePoolDevice_InfluentFlow' ), '--' ) AS nowFlow,
IFNULL( ( SELECT field_value FROM wl_form_instance_equip WHERE instance_id = wes.id AND field_name = 'maxFlow' ), 0 ) AS maxFlow,
IFNULL( ( SELECT field_value FROM wl_form_instance_equip WHERE instance_id = wes.id AND field_name = 'minFlow' ), 0 ) AS minFlow