Hi Chris, According to this - https://issues.apache.org/jira/browse/HIVE-6098, UNION ALL is still not supported on Tez , and so are SMB joins
Thanks Suma On Sat, Aug 16, 2014 at 4:09 AM, Dragga, Christopher < chris.dra...@netapp.com> wrote: > Hi- > > > > I’m using Hive 0.13.1 on Tez and running into an odd null pointer error. > If I run a query of the form > > > > SELECT foo, bar FROM a > > UNION ALL > > SELECT foo, bar FROM b; > > > > where either a or b is an empty table partitioned on a single key (neither > foo nor bar), Hive exits with the message “FAILED: NullPointerException > null” before it can runs any tasks. If the tables in question are not > partitioned, or if I use Map Reduce as the execution engine rather than > Tez, the query completes successfully. Has anyone run into this before? > The immediate solution seems to be to temporarily switch the execution > engine for this query; are there any better workarounds? Finally, is this > likely to be a bug, and, if so, should I submit a JIRA? The problem seems > related to JIRA 2747, but I don’t think it’s the same. > > > > Thanks, > > Chris Dragga >
