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https://issues.apache.org/jira/browse/HIVE-19186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16436272#comment-16436272
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Steve Yeom commented on HIVE-19186:
-----------------------------------
One idea used for this jira to verify the results of a multi table insert
statements query is
to partition a multi table insert query into queries with single insert
statement.
E.g.,
for the above, for example, this query
"
from intermediate
insert into table multi_partitioned partition(p=2) select p, key
insert overwrite table multi_partitioned partition(p=1) select key, p;
"
can be partitioned into two queries:
"from intermediate insert into table multi_partitioned partition(p=2) select p,
key" and
"from intermediate insert overwrite table multi_partitioned partition(p=1)
select key, p;".
The final results of these two commands should be equivalent to the one multi
insert query.
> Multi Table INSERT statements query has a flaw for partitioned table when
> INSERT INTO and INSERT OVERWRITE are used
> -------------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-19186
> URL: https://issues.apache.org/jira/browse/HIVE-19186
> Project: Hive
> Issue Type: Bug
> Components: Query Planning
> Affects Versions: 3.0.0
> Reporter: Steve Yeom
> Assignee: Steve Yeom
> Priority: Major
> Fix For: 3.0.0
>
> Attachments: HIVE-19186.01.patch
>
>
> One problem test case is:
> create table intermediate(key int) partitioned by (p int) stored as orc;
> insert into table intermediate partition(p='455') select distinct key from
> src where key >= 0 order by key desc limit 2;
> insert into table intermediate partition(p='456') select distinct key from
> src where key is not null order by key asc limit 2;
> insert into table intermediate partition(p='457') select distinct key from
> src where key >= 100 order by key asc limit 2;
> create table multi_partitioned (key int, key2 int) partitioned by (p int);
> from intermediate
> insert into table multi_partitioned partition(p=2) select p, key
> insert overwrite table multi_partitioned partition(p=1) select key, p;
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