Hello Owen, Thanks for your reply.
I am seeing its providing the advantage which Avro provided , of adding and removing fields. Can you please write some sample code for hive table which is partitioned and each partitioned has different schema. I tried searching but could not find any example. Thanks in advance for your help. Regards, Jagat Singh On Fri, Mar 29, 2013 at 4:48 PM, Owen O'Malley <omal...@apache.org> wrote: > Actually, Hive already has the ability to have different schemas for > different partitions. (Although of course it would be nice to have the > alter table be more flexible!) > > The "versioned metadata" means that the ORC file's metadata is stored in > ProtoBufs so that we can add (or remove) fields to the metadata. That means > that for some changes to ORC file format we can provide both forward and > backward compatibility. > > -- Owen > > > On Thu, Mar 28, 2013 at 10:25 PM, Jagat Singh <jagatsi...@gmail.com>wrote: > >> Hello Nitin, >> >> Thanks for sharing. >> >> Do we have more details on >> >> Versioned metadata feature of ORC ? , is it like handling varying schemas >> in Hive? >> >> Regards, >> >> Jagat Singh >> >> >> >> On Fri, Mar 29, 2013 at 4:16 PM, Nitin Pawar <nitinpawar...@gmail.com>wrote: >> >>> >>> Hi, >>> >>> Here is is a nice presentation from Owen from Hortonworks on "Optimizing >>> hive queries" >>> >>> http://www.slideshare.net/oom65/optimize-hivequeriespptx >>> >>> >>> >>> Thanks, >>> Nitin Pawar >>> >> >> >
