Join ordering is not yet part of the Hive optimizer. There is integration work being done with the Optiq framework that will address this, but it is not complete yet. Hopefully at least an initial integration will be available in the next Hive release.
Alan. On May 2, 2014, at 5:36 AM, Aleksei Udatšnõi <a.udac...@gmail.com> wrote: > Hello, > > There is this old recommendation for optimizing Hive join to use the largest > table last in the join. > http://archive.cloudera.com/cdh/3/hive/language_manual/joins.html > > The same recommendation appears in Programming Hive book. > > Is this recommendation still valid or newer version of Hive take care of such > optimization automatically? > > Best, > Aleksei > -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
