map-join map-only jobs not collapsed with subsequent map-reduce jobs
--------------------------------------------------------------------
Key: HIVE-1288
URL: https://issues.apache.org/jira/browse/HIVE-1288
Project: Hadoop Hive
Issue Type: Bug
Components: Query Processor
Reporter: Joydeep Sen Sarma
for queries of the form
... from
(select /*+ mapjoin (b) */ a.*
from t1 a
join t2 b
on (a.x=b.x)
join t3 c
on (a.y=c.y)
) d
...
i find that the plan includes one map-only job for a join b and following
map-reduce job for the join with 'c'. it seems that we should be able to
combine the map-only map-join with the map phase of the next job (and have one
less job as a whole)
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
