例子：
update work_order
set order_state = '1'
where line_id = p_line_id
and order_state = '0'
and order_type = 'DPY'
and ORDER_PRIORITY = (select min(ORDER_PRIORITY)
from work_order
where order_state = '0'
and order_type = 'DPY'
and LINE_ID = p_line_id
and order_priority > 0
group by LINE_ID)
and exists
(select 1
from product_level pl
where pl.pid = pid
and pl.child_pid =
(select (select pid
from product_maintain pm
where pm.product_number =
rw.material_number
and pm.rstate = rw.material_rstate)
from routing_wip rw
where rw.sn = p_sn))
and rownum <= 1;
if sql%rowcount > 1 then [color=red] //代表上面update语句影响的行数[/color]
raise_application_error (-20015,
'Work order with same priority in the waiting queue ! ');
转播
