okumin created HIVE-25410:
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Summary: CommonMergeJoinOperator fails when a join key is ARRAY
with arbitrary size
Key: HIVE-25410
URL: https://issues.apache.org/jira/browse/HIVE-25410
Project: Hive
Issue Type: Bug
Components: Hive
Reporter: okumin
Assignee: okumin
Fix For: 4.0.0
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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