[jira] [Assigned] (HIVE-19891) inserting into external tables with custom partition directories may cause data loss

["Sergey Shelukhin (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-19891?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Shelukhin reassigned HIVE-19891:
---------------------------------------

    Assignee: Sergey Shelukhin

> inserting into external tables with custom partition directories may cause data loss
> ------------------------------------------------------------------------------------
>
>                 Key: HIVE-19891
>                 URL: https://issues.apache.org/jira/browse/HIVE-19891
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>            Priority: Major
>
> tbl1 is just used as a prop to create data, could be an existing directory for an external table.
> Due to weird behavior of LoadTableDesc (some ancient code for overriding old partition path), custom partition path is overwritten after the query and the data in it ceases being a part of the table (can be seen in desc formatted output with masking commented out in QTestUtil)
> This affects branch-1 too, so it's pretty old.
> {noformat}drop table tbl1;
> CREATE TABLE tbl1 (index int, value int ) PARTITIONED BY ( created_date string );
> insert into tbl1 partition(created_date='2018-02-01') VALUES (2, 2);
> CREATE external TABLE tbl2 (index int, value int ) PARTITIONED BY ( created_date string );
> ALTER TABLE tbl2 ADD PARTITION(created_date='2018-02-01');
> ALTER TABLE tbl2 PARTITION(created_date='2018-02-01') SET LOCATION 'file:/Users/sergey/git/hivegit/itests/qtest/target/warehouse/tbl1/created_date=2018-02-01';
> select * from tbl2;
> describe formatted tbl2 partition(created_date='2018-02-01');
> insert into tbl2 partition(created_date='2018-02-01') VALUES (1, 1);
> select * from tbl2;
> describe formatted tbl2 partition(created_date='2018-02-01');
> {noformat}



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