On Wed, Jul 3, 2013 at 5:19 AM, David Morel <dmore...@gmail.com> wrote:
> > That is still not really answering the question, which is: why is it slower > to run a query on a heavily partitioned table than it is on the same number > of files in a less heavily partitioned table. > According to Gopal's investigations in https://issues.apache.org/jira/browse/HIVE-4051, each time Hive plans a query, it does a query per a partition to the backing SQL database. That would explain a lot of the latency for tables with large numbers of partitions. -- Owen
