[jira] [Created] (IMPALA-9725) LEFT ANTI JOIN produces wrong result when PHJ build spills

["Xiaomin Zhang (Jira)" <ji...@apache.org>]

Xiaomin Zhang created IMPALA-9725:
-------------------------------------

             Summary: LEFT ANTI JOIN produces wrong result when PHJ build spills
                 Key: IMPALA-9725
                 URL: https://issues.apache.org/jira/browse/IMPALA-9725
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
    Affects Versions: Impala 3.4.0
            Reporter: Xiaomin Zhang


Using the attached data set, below query produced non-zero result when setting a small mem_limt. The expected result should be 0 because we are simply ANTI JOIN the same table.


set mem_limit=100m;
select id from wide_test.wide L1 where not exists (
 select 1 from wide_test.wide L2 where L1.id = L2.id
 and L1.col2 = L2.col2
 and L1.col3 = L2.col3
 and L1.col4 = L2.col4
 and L1.col5 = L2.col5
 and L1.col6 = L2.col6
 and L1.col7 = L2.col7
 and L1.col8 = L2.col8
 and L1.col9 = L2.col9
 and L1.col10 = L2.col10
 and L1.col11 = L2.col11
 and L1.col12 = L2.col12
 and L1.col13 = L2.col13
 and L1.col14 = L2.col14
 and L1.col15 = L2.col15
 and L1.col16 = L2.col16
 and L1.col17 = L2.col17
 and L1.col18 = L2.col18
 and L1.col19 = L2.col19
 and L1.col20 = L2.col20
 and L1.col21 = L2.col21
 and L1.col22 = L2.col22
 and L1.col23 = L2.col23
) order by id;

 

With a larger mem_limit (or do not set mem_limit), above query return 0 which is correct.



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