Re: Fix up grouping sets reorder

Hi,

On 2019-06-17 17:23:11 +0800, Richard Guo wrote:
> During the reorder of grouping sets into correct prefix order, if only
> one aggregation pass is needed, we follow the order of the ORDER BY
> clause to the extent possible, to minimize the chance that we add
> unnecessary sorts. This is implemented in preprocess_grouping_sets -->
> reorder_grouping_sets.

Thanks for finding!

Andrew, could you take a look at that?

- Andres