Hi, Thanks for the replies. I already knew that the optimizer already does that. My usecase is a bit different though. I want to display the flattened query back to the user. So I was hoping of using internal Hive CBO to somehow change the AST generated for the query somehow.
Thanks, Aviral On Tue, Jun 14, 2016 at 12:42 PM, Gopal Vijayaraghavan <gop...@apache.org> wrote: > > > You can see that you get identical execution plans for the nested query > >and the flatten one. > > Wasn't that always though. Back when I started with Hive, before Stinger, > it didn't have the identity project remover. > > To know if your version has this fix, try looking at > > hive> set hive.optimize.remove.identity.project; > > > Cheers, > Gopal > > > > >
