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https://issues.apache.org/jira/browse/HIVE-23347?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17108164#comment-17108164
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Sankar Hariappan commented on HIVE-23347:
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[~nareshpr], [~adeshrao]
I think, Hive should treat Year=2020/Month=3/Day=2 and year=2020/month=3/day=2
as same partition. If both paths exists in storage, then MSCK should throw
error as duplication partition directory.
However, dept=Sales and dept=sales are not same partition where dept is String
column. Hive just treats the partition column name as case insensitive but
partition values as case sensitive.
> MSCK REPAIR cannot discover partitions with upper case directory names.
> -----------------------------------------------------------------------
>
> Key: HIVE-23347
> URL: https://issues.apache.org/jira/browse/HIVE-23347
> Project: Hive
> Issue Type: Bug
> Components: Standalone Metastore
> Affects Versions: 3.1.0
> Reporter: Sankar Hariappan
> Assignee: Adesh Kumar Rao
> Priority: Minor
> Labels: pull-request-available
> Attachments: HIVE-23347.01.patch, HIVE-23347.2.patch,
> HIVE-23347.3.patch, HIVE-23347.4.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> For the following scenario, we expect MSCK REPAIR to discover partitions but
> it couldn't.
> 1. Have partitioned data path as follows.
> hdfs://mycluster/datapath/t1/Year=2020/Month=03/Day=10
> hdfs://mycluster/datapath/t1/Year=2020/Month=03/Day=11
> 2. create external table t1 (key int, value string) partitioned by (Year int,
> Month int, Day int) stored as orc location hdfs://mycluster/datapath/t1'';
> 3. msck repair table t1;
> 4. show partitions t1; --> Returns zero partitions
> 5. select * from t1; --> Returns empty data.
> When the partition directory names are changed to lower case, this works fine.
> hdfs://mycluster/datapath/t1/year=2020/month=03/day=10
> hdfs://mycluster/datapath/t1/year=2020/month=03/day=11
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