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From "ASF GitHub Bot (Jira)" <j...@apache.org>
Subject [jira] [Work logged] (HIVE-20137) Truncate for Transactional tables should use base_x
Date Thu, 01 Oct 2020 12:30:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-20137?focusedWorklogId=493464&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-493464
]

ASF GitHub Bot logged work on HIVE-20137:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 01/Oct/20 12:29
            Start Date: 01/Oct/20 12:29
    Worklog Time Spent: 10m 
      Work Description: pvargacl commented on a change in pull request #1532:
URL: https://github.com/apache/hive/pull/1532#discussion_r498204987



##########
File path: ql/src/java/org/apache/hadoop/hive/ql/io/AcidUtils.java
##########
@@ -114,16 +114,16 @@
 public class AcidUtils {
   // This key will be put in the conf file when planning an acid operation
   public static final String CONF_ACID_KEY = "hive.doing.acid";
-  public static final String BASE_PREFIX = "base_";
+  public static final String BASE_PREFIX = AcidConstants.BASE_PREFIX;

Review comment:
       I am not sure I want to remove these public constants, the AcidUtils is unfortunately
is being used by spark-acid and it might break compatibility...




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Issue Time Tracking
-------------------

    Worklog Id:     (was: 493464)
    Time Spent: 40m  (was: 0.5h)

> Truncate for Transactional tables should use base_x
> ---------------------------------------------------
>
>                 Key: HIVE-20137
>                 URL: https://issues.apache.org/jira/browse/HIVE-20137
>             Project: Hive
>          Issue Type: Improvement
>          Components: Transactions
>    Affects Versions: 3.0.0
>            Reporter: Eugene Koifman
>            Assignee: Peter Varga
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> This is a follow up to HIVE-19387.
> Once we have a lock that blocks writers but not readers (HIVE-19369), it would make sense
to make truncate create a new base_x, where is x is a writeId in current txn - the same as
Insert Overwrite does.
> This would mean it can work w/o interfering with existing writers.



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