As I understand it is also single threader for joins (not with lookup tables, but with different OLAP), am I right?
Could you please guide me where it happens in the code? I would like to contribute. Maybe there are already some tickets about it? On Sun, Aug 6, 2017 at 9:12 AM, Li Yang <liy...@apache.org> wrote: > That is right. Sub-queries are executed sequentially as of Kylin 2.0. > > On Fri, Jul 28, 2017 at 2:16 AM, Alexander Sterligov <sterligo...@joom.it> > wrote: > >> Hello! >> >> My fact table has 12 boolean fields and user id. I need to count distinct >> users with has certain combinations of these flags. So I do several >> sub-queries and union all of them. >> This query may take up to one minute and it doesn't depend on number of >> regionservers in hbase. >> >> It looks like sub-queries are executed sequentially. Or maybe segment >> pruning by dictionary is done sequentially. >> >> Am I right? >> >> Best regards, >> Alexander >> > >
