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From "Matt McCline (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-8513) Vectorize multiple children operators
Date Sat, 18 Oct 2014 00:30:34 GMT
Matt McCline created HIVE-8513:
----------------------------------

             Summary: Vectorize multiple children operators 
                 Key: HIVE-8513
                 URL: https://issues.apache.org/jira/browse/HIVE-8513
             Project: Hive
          Issue Type: Bug
          Components: Vectorization
            Reporter: Matt McCline
            Assignee: Matt McCline


For HIVE-8498 we turned off vectorization if any operator is encountered with multiple children.

Thus, this query will not be vectorized:
from orc1 a
insert overwrite table orc_rn1 select a.* where a.rn < 100
insert overwrite table orc_rn2 select a.* where a.rn >= 100 and a.rn < 1000
insert overwrite table orc_rn3 select a.* where a.rn >= 1000;

But Prashanth [~prasanthj] also points that correlation operators Mux/Demux will also not
be vectorized, too.





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