On Thu, Mar 8, 2018 at 9:15 AM, Jeevan Chalke <jeevan.cha...@enterprisedb.com> wrote: > I am not sure why we don't set reltarget into the grouped_rel too. > > But if we do so like we did in partially_grouped_rel, then it will be lot > easier for partitionwise aggregate as then we don't have to pass target to > functions creating paths like create_append_path. We now need to update > generate_gather_paths() to take target too as it is now being called on > grouped_rel in which reltarget is not set. > > But yes, if there is any specific reason we can't do so, then I think the > same like Ashutosh Said. I didn't aware of such reason though.
I see no problem with setting reltarget for the grouped_rel. Before we added partially_grouped_rel, that rel computed paths with two different targets: partial paths had the partial grouping target, and non-partial paths had the ordinary grouping target. But that's fixed now. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
