Re: Wrong results with grouping sets

I noticed that this query worked correctly in the main branch with the inequality operator:

postgres=# select distinct on (a, b) a, b from (values (3, 1), (2, 2)) as t (a, b) where a > b group by grouping sets((a, b), (a)); a | b ---+--- 3 | 1 3 | (2 rows)

So, I think you are right)

I looked at your patch and noticed a few things:

1. I think you should add a test with the cube operator, because I noticed that the order of the query in the result has also changed: