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https://issues.apache.org/jira/browse/HIVE-24433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17245097#comment-17245097
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Denys Kuzmenko commented on HIVE-24433:
---------------------------------------
Merged to master.
[~nareshpr], thank you for the patch and [~vpeter], [~klcopp] for the review!
> AutoCompaction is not getting triggered for CamelCase Partition Values
> ----------------------------------------------------------------------
>
> Key: HIVE-24433
> URL: https://issues.apache.org/jira/browse/HIVE-24433
> Project: Hive
> Issue Type: Bug
> Reporter: Naresh P R
> Assignee: Naresh P R
> Priority: Major
> Labels: pull-request-available
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> PartionKeyValue is getting converted into lowerCase in below 2 places.
> [https://github.com/apache/hive/blob/master/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/TxnHandler.java#L2728]
> [https://github.com/apache/hive/blob/master/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/TxnHandler.java#L2851]
> Because of which TXN_COMPONENTS & HIVE_LOCKS tables are not having entries
> from proper partition values.
> When query completes, the entry moves from TXN_COMPONENTS to
> COMPLETED_TXN_COMPONENTS. Hive AutoCompaction will not recognize the
> partition & considers it as invalid partition
> {code:java}
> create table abc(name string) partitioned by(city string) stored as orc
> tblproperties('transactional'='true');
> insert into abc partition(city='Bangalore') values('aaa');
> {code}
> Example entry in COMPLETED_TXN_COMPONENTS
> {noformat}
> +-----------+--------------+--------------------+-------------------+---------------------+-------------+-------------------+
> | CTC_TXNID | CTC_DATABASE | CTC_TABLE | CTC_PARTITION |
> CTC_TIMESTAMP | CTC_WRITEID | CTC_UPDATE_DELETE |
> +-----------+--------------+--------------------+-------------------+---------------------+-------------+-------------------+
> | 2 | default | abc | city=bangalore | 2020-11-25 09:26:59
> | 1 | N |
> +-----------+--------------+--------------------+-------------------+---------------------+-------------+-------------------+
> {noformat}
>
> AutoCompaction fails to get triggered with below error
> {code:java}
> 2020-11-25T09:35:10,364 INFO [Thread-9]: compactor.Initiator
> (Initiator.java:run(98)) - Checking to see if we should compact
> default.abc.city=bangalore
> 2020-11-25T09:35:10,380 INFO [Thread-9]: compactor.Initiator
> (Initiator.java:run(155)) - Can't find partition
> default.compaction_test.city=bangalore, assuming it has been dropped and
> moving on{code}
> I verifed below 4 SQL's with my PR, those all produced correct
> PartitionKeyValue
> i.e, COMPLETED_TXN_COMPONENTS.CTC_PARTITION="city=Bangalore"
> {code:java}
> insert into table abc PARTITION(CitY='Bangalore') values('Dan');
> insert overwrite table abc partition(CiTy='Bangalore') select Name from abc;
> update table abc set Name='xy' where CiTy='Bangalore';
> delete from abc where CiTy='Bangalore';{code}
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