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From "Eugene Koifman (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-18131) Truncate table for Acid tables
Date Thu, 03 May 2018 18:03:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-18131?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eugene Koifman updated HIVE-18131:
----------------------------------
    Attachment: HIVE-18131.02.patch

> Truncate table for Acid tables
> ------------------------------
>
>                 Key: HIVE-18131
>                 URL: https://issues.apache.org/jira/browse/HIVE-18131
>             Project: Hive
>          Issue Type: Task
>          Components: Transactions
>            Reporter: Eugene Koifman
>            Assignee: Eugene Koifman
>            Priority: Major
>         Attachments: HIVE-18131.01.patch, HIVE-18131.02.patch
>
>
> How should this work?  Should it work like Insert Overwrite T select * from T where 1=2?
> This should create a new empty base_x/ and thus operate w/o violating Snapshot Isolation
semantics.
> This makes sense for specific partition or unpartitioned table.  What about "Truncate
T" where T is partitioned?  Is the expectation to wipe out all partition info or to make each
partition empty?



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