Re: ALTER TABLE validate foreign key dependency problem

On Mon, 13 Jul 2020 at 08:13, Simon Riggs <simon@2ndquadrant.com> wrote:
>
> On Sun, 12 Jul 2020 at 05:51, David Rowley <dgrowleyml@gmail.com> wrote:
>
>>
>> > I also considered that we could just delay all foreign key validations
>> > until phase 3, but I ended up just doing then only when a rewrite is
>> > pending.
>>
>> I still wonder if it's best to delay the validation of the foreign key
>> regardless of if there's a pending table rewrite, but the patch as it
>> is now only delays if there's a pending rewrite.
>
>
> Consistency seems the better choice, so I agree we should validate later in all cases. Does changing that have any
othereffects?
 

Thanks for having a look here.

I looked at this again and noticed it wasn't just FOREIGN KEY
constraints. CHECK constraints were being validated at the wrong time
too.

I did end up going with unconditionally moving the validation until
phase 3. I've pushed fixed back to 9.5

David