mysql - 更新 mysql 中的表后触发错误 1054

Question

我有 3 个表:

master_parts_list

id int(11) not null auto increment
part_number varchar(30) unique
description varchar(255)
price decimal(10,2)
weight decimal(10,2)
active tinyint(1)
quantity_on_hand decimal(10,2)
quantity_allocated decimal(10,2)
quantity_on_order decimal(10,2)
old_part_number varchar(30)

sales_orders

id int(11) not null primary key auto increment
quote_number int(11) unique
order_number int(11) unique
invoice_number int(11) unique
status varchar(255)
customer_number int(11)
customer_po_number char(30)
...and 15 others...

sales_order_parts

id int(11) not null primary key auto increment
order_id int(11)
part_id int(5)
order_quantity int(5)
ship_quantity int(5)
unit_price decimal(10,2)
note varchar(255)

What I wanted to do was update the fields quantity_on_hand quantity_allocated quantity_on_order

What I want the outcome to be is: When a record is added to sales_order_parts table, (creating a new item for a sales order) add the order_quantity to quantity_allocated field in master_part_list. When a record is changed or deleted for sales_order_parts for the order_quantity, update the quantity_allocated field. When a record is invoices, as indicated by a value in the invoice_number field, deduct the ship_quantity from the quantity_on_hand. Basic inventory management.

I was wrote a trigger for Insert on sales_order_parts create trigger allocated_addition_insert

create trigger allocated_addition_insert
after insert on sales_order_parts
for each row
update master_part_list
set master_part_list.quantity_allocated=
    (select sum(order_quantity)
from
    sales_orders
        inner join
    sales_order_parts on sales_orders.id = sales_order_parts.order_id
where sales_orders.invoice_number is null and sales_order_parts.part_id = master_part_list.id
group by part_id)

这是有效的，在每条新记录之后，代码运行并更新 quantity_allocated 为 null invoice_number(表示尚未开具发票)，总计按部分分组。

我正在处理 sales_orders 的更新触发器

delimiter $$
create trigger allocated_order_on_hand_update
after update on sales_orders
for each row begin
    update master_part_list
    set master_part_list.quantity_on_hand=master_part_list.quantity_on_hand-(select sum(ship_quantity)
    from
    sales_orders
        join
    sales_order_parts on sales_orders.id = sales_order_parts.order_id
    where sales_orders.invoice_number = new.sales_orders.invoice_number
    and sales_orders.invoice_number is not null
    group by part_id);

    update master_part_list
    set master_part_list.quantity_allocated=(select sum(order_quantity)
    from
    sales_orders
        inner join
    sales_order_parts on sales_orders.id = sales_order_parts.order_id
    where sales_orders.invoice_number is null and sales_order_parts.part_id = master_part_list.id
    group by part_id);
end$$

第二次更新在 invoice_number 为 null 时运行，但是当尝试更新和保存发票时，它在 invoice_number 字段中设置发票编号，但在 invoice_number 不为空的情况下它不起作用。基本上，当订单开具发票时，从 master_part_list 中的 quantity_on_hand 中减去 ship_quantity 的数量，但只减去该特定销售订单的零件。我收到错误:

#1054 - 'Unknown column 'new.sales_orders.invoice_number' in 'where clause"

有什么想法吗？

Answer 1

经过一番努力，我想通了。
下面是插入 sales_order_parts 的触发器代码。 它汇总了所有按零件分组的未结订单 order_quantity 字段的值，并在 master_parts_list 中的 quantity_allocated 字段中设置该值。它省略了所有报价和已经开具发票的订单。

create trigger allocated_addition_insert
after insert on sales_order_parts
for each row
update master_part_list
set master_part_list.quantity_allocated=
    (select sum(order_quantity)
from
    sales_orders
        inner join
    sales_order_parts on sales_orders.id = sales_order_parts.order_id
where sales_orders.invoice_number is null 
and sales_order_parts.part_id = master_part_list.id 
and sales_orders.status <> "Quote" 
group by part_id);

这是为了更新 sales_order_parts 中已更改数量的值 以下是 sales_order_parts 更新前的触发器代码。

create trigger allocated_minus_update
before update on sales_order_parts
for each row
    update master_part_list set master_part_list.quantity_allocated = master_part_list.quantity_allocated - old.order_quantity
    where master_part_list.id = old.part_id;

这是 sales_order_parts 更新后的触发器代码。

create trigger allocated_add_update
after update on sales_order_parts
for each row
    update master_part_list set master_part_list.quantity_allocated = master_part_list.quantity_allocated + new.order_quantity
    where master_part_list.id = new.part_id;

这是更新 sales_orders 的代码。

delimiter $$
create trigger allocated_order_on_hand_update
after update on sales_orders
for each row begin
    update master_part_list
    set master_part_list.quantity_on_hand = master_part_list.quantity_on_hand -
    coalesce((select sum(ship_quantity)
    from
    sales_order_parts
            inner join
    sales_orders on sales_orders.id = sales_order_parts.order_id
    where sales_orders.invoice_number = new.invoice_number
    and sales_order_parts.part_id = master_part_list.id
    and new.invoice_number > 0
    group by sales_order_parts.part_id),0);

    update master_part_list
    set master_part_list.quantity_allocated=
    (select sum(order_quantity)
    from
    sales_orders
        inner join
    sales_order_parts on sales_orders.id = sales_order_parts.order_id
    where sales_orders.invoice_number is null 
    and sales_order_parts.part_id = master_part_list.id 
    and sales_orders.status <> "Quote" 
    group by part_id);
end$$
delimiter ;

这些触发器脚本对我来说效果很好，但欢迎提出任何建议或意见。谢谢。