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From: Ron Johnson <[email protected]>
To: pgsql-generallists.postgresql.org <[email protected]>
Subject: Re: Automatic deletion of orphaned rows
Date: Wed, 22 Jan 2025 10:15:04 -0500
Message-ID: <CANzqJaBvJ=jXKuyahznN3_GrT0gAdw+r_+xSOd7P72EVufMvSw@mail.gmail.com> (raw)
In-Reply-To: <CAKFQuwa9Z3OiEHA6ZLMdJc=ScaBy=TVL5wMUBVXUtOY08r1tXw@mail.gmail.com>
References: <[email protected]>
	<CANzqJaAsAY_u-OoZHojfk6E2bjjndqNEu2qNqy7-Xi-CPbe=_g@mail.gmail.com>
	<CAKFQuwa9Z3OiEHA6ZLMdJc=ScaBy=TVL5wMUBVXUtOY08r1tXw@mail.gmail.com>

On Wed, Jan 22, 2025 at 9:37 AM David G. Johnston <
[email protected]> wrote:

> On Wednesday, January 22, 2025, Ron Johnson <[email protected]>
> wrote:
>>
>>
>>> I therefore propose a feature, to be able to specify in a table schema
>>> that a row should be deleted if orphaned.
>>
>>
>> For one thing, rows *can't* be orphaned if there's a foreign key
>> reference.
>>
>
> The description was correct even though using probably imprecise
> terminology.  The basic goal is to delete childless parents.
>

That's kinda what I thought he wrote, but it's so far beyond "normal" that
I dismissed the possibility.  Parents are allowed to not have
children, after all.

Is there *ANY* DBMS with a built-in reverse FK "parents must have children"
feature?

-- 
Death to <Redacted>, and butter sauce.
Don't boil me, I'm still alive.
<Redacted> lobster!

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