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https://issues.apache.org/jira/browse/HIVE-11237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aihua Xu resolved HIVE-11237.
-----------------------------
    Resolution: Duplicate

Similar one HIVE-11208 is already created. 

> Unable to drop a default partition with "int" type
> --------------------------------------------------
>
>                 Key: HIVE-11237
>                 URL: https://issues.apache.org/jira/browse/HIVE-11237
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 2.0.0
>            Reporter: Aihua Xu
>            Assignee: Aihua Xu
>
> {noformat}
> CREATE TABLE test (col1 string) PARTITIONED BY (p1 int) ROW FORMAT DELIMITED 
> FIELDS TERMINATED BY '\001' STORED AS TEXTFILE;
> INSERT OVERWRITE TABLE test PARTITION (p1) SELECT code, IF(salary > 60000, 
> 100, null) as p1 FROM default.sample_07;
> hive> SHOW PARTITIONS test;
> OK
> p1=100
> p1=__HIVE_DEFAULT_PARTITION__
> Time taken: 0.124 seconds, Fetched: 2 row(s)
> hive> ALTER TABLE test DROP partition (p1 = '__HIVE_DEFAULT_PARTITION__');
> FAILED: SemanticException Unexpected unknown partitions for (p1 = null)
> {noformat}
> The default partition name '__HIVE_DEFAULT_PARTITION__' cannot be deleted.



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