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Posted to dev@hive.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2015/04/14 23:14:59 UTC

[jira] [Created] (HIVE-10334) LLAP: Self-joins with the cache enabled

Gopal V created HIVE-10334:
------------------------------

             Summary: LLAP: Self-joins with the cache enabled
                 Key: HIVE-10334
                 URL: https://issues.apache.org/jira/browse/HIVE-10334
             Project: Hive
          Issue Type: Sub-task
    Affects Versions: llap
            Reporter: Gopal V
            Assignee: Sergey Shelukhin


Looks like reading the same split from 2 tasks in the same process might have some corner cases.

{code}
hive> select count(1) from tpch_orc_snappy_1000.region y join tpch_orc_snappy_1000.region x;
OK
0
{code}

{code}
hive> set hive.llap.io.enabled=false;
hive> select count(1) from tpch_orc_snappy_1000.region y join tpch_orc_snappy_1000.region x;
OK
25
{code}



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