Re: [GENERAL] spi/timetravel: unique constraint violation on UPDATE

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От Tom Lane
Тема Re: [GENERAL] spi/timetravel: unique constraint violation on UPDATE
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Msg-id 30827.1500156193@sss.pgh.pa.us
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Ответ на Re: [GENERAL] spi/timetravel: unique constraint violation on UPDATE  (postgresql@get-experience.com)
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postgresql@get-experience.com writes:
> Den 15. juli 2017 23:15, skrev Tom Lane:
>> Perhaps you could make your PK be on (id, valid_from, valid_to).

> Doesn't really work because valid_to would change on UPDATE. I'd need to
> update foreign relations with another trigger which would be very ugly.

Um ... wouldn't ON UPDATE CASCADE help?

            regards, tom lane

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