ERROR: cannot ALTER TABLE because it has pending trigger events while attempting to drop a column in a table

Question

我在我的 liquibase 变更集中写了一个 sql 标签。此 sql 代码假设在名为 "Purchase" 的 table 中进行数据迁移。所以我有以下 sql 个查询：

UPDATE purchase
SET location_id = (SELECT location_id FROM shop WHERE shop.id = purchase.shop_id);

然后，

ALTER TABLE purchase DROP COLUMN shop_id;

但是我在尝试执行第二个查询时收到以下错误，该查询应该删除 table Purchase

中的列 'shop_id'

ERROR: cannot ALTER TABLE  because it has pending trigger events

请问这个错误是什么时候抛出的，我该如何解决。

在我的liquibase changese中，我的sql标签是这样写的

<sql>
     UPDATE purchase
     SET location_id = (SELECT location_id FROM shop WHERE shop.id = purchase.shop_id);        

     ALTER TABLE purchase DROP COLUMN shop_id;
</sql

有人可以帮助我吗？预先感谢您的帮助

Answer 1

听起来您需要在更改和更新之间提交您的更改。

试试这个：

UPDATE purchase
SET location_id = (SELECT location_id FROM shop WHERE shop.id = purchase.shop_id);
COMMIT;
BEGIN;
ALTER TABLE purchase DROP COLUMN shop_id;

"BEGIN;" 是可选的，但听起来您的框架正在使用事务，所以我将其包括在内并进行测试以确保更改实际上 "takes"。

ERROR: cannot ALTER TABLE because it has pending trigger events while attempting to drop a column in a table

ERROR: cannot ALTER TABLE because it has pending trigger events while attempting to drop a column in a table

sql

postgresql

liquibase