Xiaomin Zhang created IMPALA-9725:
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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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