Tom Lane wrote:
> Bruce Momjian <bruce@momjian.us> writes:
> > Tom Lane wrote:
> >> I'm not sure whether there is any clear rule for what rows you get when
> >> grouping by a non-PK column in mysql, but it'll let you do it.
>
> > I understand this. The issue is how many people who complained about
> > our GROUP BY behavior were grouping by something that was a primary key,
> > and how many were not using a primary key? The former will no longer
> > complain.
>
> No doubt, but the TODO entry you removed is still 100% accurately
> worded, and what's more the archive entry it links to clearly describes
> exactly the point at issue, namely that grouping by a PK *isn't*
> indeterminate. You were wrong to remove it.
OK, I put it back, but I still feel we might not need it anymore.
-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://enterprisedb.com
+ It's impossible for everything to be true. +