On Wed, Dec 29, 2021, at 16:28, Tom Lane wrote:
>Peter Eisentraut <peter.eisentraut@enterprisedb.com> writes:
>> In the 1990s, there were some SQL drafts that included syntax like
>> JOIN ... USING PRIMARY KEY | USING FOREIGN KEY | USING CONSTRAINT ...
>> AFAICT, these ideas just faded away because of other priorities, so if
>> someone wants to revive it, some work already exists.
>
> Interesting! One thing that bothered me about this whole line of
> discussion is that we could get blindsided in future by the SQL
> committee standardizing the same idea with slightly different
> syntax/semantics. I think borrowing this draft text would greatly
> improve the odds of that not happening. Do you have access to
> full details?
Wisely said, I agree.
I have access to the ISO online document database, but the oldest SQL documents I could find there are from 2008-10-15.
I searched for document titles containing "SQL" in both ISO/IEC JTC 1/SC 32 and ISO/IEC JTC 1/SC 32/WG 3.
It would be very interesting to read these old SQL drafts from the 1990s, if they can be found.
/Joel