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From "Pengcheng Xiong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11863) FS based stats collection generates wrong results for tez (for union queries)
Date Mon, 28 Dec 2015 23:49:49 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15073269#comment-15073269
] 

Pengcheng Xiong commented on HIVE-11863:
----------------------------------------

to repro, set engine as tez
{code}
create table final_temp as select * from src union all select * from src1;
desc extended final_temp;
{code}
the results are
{code}
numRows=0, rawDataSize=0
{code}

> FS based stats collection generates wrong results for tez (for union queries)
> -----------------------------------------------------------------------------
>
>                 Key: HIVE-11863
>                 URL: https://issues.apache.org/jira/browse/HIVE-11863
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 1.3.0, 2.0.0
>            Reporter: Prasanth Jayachandran
>
> FS based stats collection is the default way to collect stats. However, there are some
cases (involving unions) where it generates wrong results. Refer test case in HIVE-11860 and
compare test cli driver results against tez results. Also it will be good to extend statsfs.q
test case with union queries.



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