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https://issues.apache.org/jira/browse/HIVE-18823?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Laszlo Bodor reassigned HIVE-18823:
-----------------------------------
Assignee: Laszlo Bodor
> Vectorization: introduce qtest for SUM (IF/WHEN) with vectorization for ORC
> ---------------------------------------------------------------------------
>
> Key: HIVE-18823
> URL: https://issues.apache.org/jira/browse/HIVE-18823
> Project: Hive
> Issue Type: Test
> Components: Hive
> Affects Versions: 2.3.0
> Reporter: Laszlo Bodor
> Assignee: Laszlo Bodor
> Priority: Major
>
> HIVE-16110 introduced some issues when using SUM aggregations with WHEN
> clause.
> As far as I can see, there is no separate qtests for validating that,
> vectorized_case is quite close, but not the same.
> The test case would be:
> {code:java}
> set hive.vectorized.execution.enabled=false;
> drop table if exists vectorization_sum_if_when_a;
> drop table if exists vectorization_sum_if_when_b;
> create table vectorization_sum_if_when_a (x int) stored as orc;
> insert into table vectorization_sum_if_when_a values (0), (1), (0), (NULL),
> (NULL), (NULL), (NULL), (NULL), (NULL), (NULL);
> create table vectorization_sum_if_when_b (x int) stored as orc;
> insert into table vectorization_sum_if_when_b select least(t1.x + t2.x + t3.x
> + t4.x, 1) from vectorization_sum_if_when_a t1, vectorization_sum_if_when_a
> t2, vectorization_sum_if_when_a t3, vectorization_sum_if_when_a t4;
> select count(*), x from vectorization_sum_if_when_b group by x;
> select sum(IF(x is null, 1, 0)), count(1) from vectorization_sum_if_when_b;
> select sum(IF(x=1, 1, 0)), count(1) from vectorization_sum_if_when_b;
> select sum((case WHEN x = 1 THEN 1 else 0 end)) from
> vectorization_sum_if_when_b;
> select sum((case WHEN x = 1 THEN 1 else 0 end)), sum((case WHEN x = 1 THEN 1
> when x is null then 0 else 0 end)) from vectorization_sum_if_when_b;
> set hive.vectorized.execution.enabled=true;
> select sum(IF(x is null, 1, 0)), count(1) from vectorization_sum_if_when_b;
> select sum(IF(x=1, 1, 0)), count(1) from vectorization_sum_if_when_b;
> select sum((case WHEN x = 1 THEN 1 else 0 end)) from
> vectorization_sum_if_when_b;
> select sum((case WHEN x = 1 THEN 1 else 0 end)), sum((case WHEN x = 1 THEN 1
> when x is null then 0 else 0 end)) from vectorization_sum_if_when_b;
> {code}
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