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https://issues.apache.org/jira/browse/HIVE-25410?focusedWorklogId=636397&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-636397
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ASF GitHub Bot logged work on HIVE-25410:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 10/Aug/21 11:05
Start Date: 10/Aug/21 11:05
Worklog Time Spent: 10m
Work Description: okumin commented on pull request #2551:
URL: https://github.com/apache/hive/pull/2551#issuecomment-895936902
Thanks for your quick review!
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Issue Time Tracking
-------------------
Worklog Id: (was: 636397)
Time Spent: 1.5h (was: 1h 20m)
> CommonMergeJoin fails for ARRAY join keys with varying size
> -----------------------------------------------------------
>
> Key: HIVE-25410
> URL: https://issues.apache.org/jira/browse/HIVE-25410
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Reporter: okumin
> Assignee: okumin
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> Thanks to HIVE-24883, CommonMergeJoinOperator can handle ARRAY or STRUCT
> types as a JOIN key.
> There are corner cases where CommonMergeJoinOperator fails with
> `ArrayIndexOutOfBoundsException`.
>
> This is a simple case.
> {code:java}
> SET hive.auto.convert.join=false;
> CREATE TABLE table_list_types (id int, key array<int>);
> INSERT INTO table_list_types VALUES (1, array(1, 2)), (2, array(1, 2)), (3,
> array(1, 2, 3)), (4, array(1, 2, 3));
> SELECT * FROM table_list_types t1 INNER JOIN table_list_types t2 ON t1.key =
> t2.key; {code}
> With 69c97c26ac68a245f4d327cc2f7b3a2333f8fa84, the following error happened.
> {code:java}
> Caused by: java.lang.ArrayIndexOutOfBoundsException: 2
> at
> org.apache.hadoop.hive.ql.exec.HiveStructComparator.compare(HiveStructComparator.java:57)
> at
> org.apache.hadoop.hive.ql.exec.CommonMergeJoinOperator.compareKey(CommonMergeJoinOperator.java:629)
> at
> org.apache.hadoop.hive.ql.exec.CommonMergeJoinOperator.compareKeys(CommonMergeJoinOperator.java:597)
> at
> org.apache.hadoop.hive.ql.exec.CommonMergeJoinOperator.processKey(CommonMergeJoinOperator.java:566)
> at
> org.apache.hadoop.hive.ql.exec.CommonMergeJoinOperator.process(CommonMergeJoinOperator.java:249)
> at
> org.apache.hadoop.hive.ql.exec.tez.ReduceRecordSource$GroupIterator.next(ReduceRecordSource.java:370)
> ... 26 more {code}
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