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From "Prasanth Jayachandran (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-17562) ACID 1.0 + ETL strategy should treat empty compacted files as uncovered deltas
Date Wed, 20 Sep 2017 00:35:00 GMT
Prasanth Jayachandran created HIVE-17562:
--------------------------------------------

             Summary: ACID 1.0 + ETL strategy should treat empty compacted files as uncovered
deltas
                 Key: HIVE-17562
                 URL: https://issues.apache.org/jira/browse/HIVE-17562
             Project: Hive
          Issue Type: Bug
    Affects Versions: 2.4.0
            Reporter: Prasanth Jayachandran
            Assignee: Prasanth Jayachandran


In branch-2, with ACID 1.0, following sequence will result in incorrect results
1) Set split strategy to ETL
2) Insert some rows
3) Delete all rows
4) Alter table compact MAJOR
5) Insert some rows
6) Select * query will not return any rows that is written at last (step 5)

The reason for that, compaction essentially voids the first insert in step 2. Now when ETL
split strategy is chosen, there will not be any stripes in the base files. So no split gets
generated and any subsequent deltas gets ignored.



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