1.删除分表报错有依赖不能删除

DROP TABLE products;

NOTICE:  constraint orders_product_no_fkey on table orders depends on table products
ERROR:  cannot drop table products because other objects depend on it
HINT:  Use DROP ... CASCADE to drop the dependent objects too.

原因如下,有外部依赖这个表,需要使用以下语句强制删除
The error message contains a useful hint: if you do not want to bother deleting all the dependent objects individually, you can run

DROP TABLE products CASCADE;

引用:
Dependency Tracking

2.更改表名

alter table 表名 rename to 新表名

3.更改字段名

alter table 表名 rename 字段名 to 新字段名