PostgreSQL：交易和外键问题

问题描述

我在表A中插入一个值，它有一个串行类型作为主键。我想使用查询的返回值作为表B的外键...但我得到这个消息：
$ b

错误：在表上插入或更新tb_midia_pessoa违反了外键约束tb_midia_pessoa_id_pessoa_fkey详细信息：键（id_pessoa）=（30）在表tb_pessoa中不存在。 ）

如何在不使用
的情况下启动新的事务
- 删除我的外键constraints = O
？

问候！
Pedro

解决方案

您可以创建一个可延迟的FK，只需使用DEFERRABLE，也许是INITIALLY DEFERRED，这取决于您。

I'm inserting a value in table A, that has a serial type as primary key. I wanna use the returned value of the query as a foreign key of table B... but I get this message:

ERROR: insert or update on table "tb_midia_pessoa" violates foreign key constraint "tb_midia_pessoa_id_pessoa_fkey" DETAIL: Key (id_pessoa)=(30) is not present in table "tb_pessoa". )

How can I make this possible without:- starting a new Transaction- droping my foreign keys constraints =O?

Regards!Pedro

解决方案

You can make a deferrable FK, just use DEFERRABLE and maybe INITIALLY DEFERRED, that's up to you.

http://www.postgresql.org/docs/current/static/sql-createtable.html

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