Re: FK constraint question

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От Ashutosh Sharma
Тема Re: FK constraint question
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Msg-id CAE9k0P=srFJ6CMs0Dsm=iPWg4eJZe4+sBe2QHKzq7vcA0GiO1w@mail.gmail.com
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Ответ на FK constraint question  ("Heinemann, Manfred (IMS)" <HeinemannM@imsweb.com>)
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Hi,

Do you have multiple task table created in your database? 

Can you share the output of \d+ task_history?

On Wednesday, April 1, 2020, Heinemann, Manfred (IMS) <HeinemannM@imsweb.com> wrote:

Can something explain why something like the following could happen?

 

INSERT INTO task_history (task_id, user_id, task_date)

SELECT task_id, user_id, task_date

FROM task

WHERE task_id IN (1, 2, 3);

 

ERROR: insert or update on table "task_history" violates foreign key constraint "fk_task_history_task_id"

  Detail: Key (task_id)=(1) is not present in table "task".

 

Thanks,

Manfred




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