[jira] [Commented] (HIVE-17296) Acid tests with multiple splits

["Eugene Koifman (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-17296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16127719#comment-16127719 ] 

Eugene Koifman commented on HIVE-17296:
---------------------------------------

ORC-228 is in ORC 1.5.  Note that MemoryManager is a ThreadLocal so changing this property may affect other tests.
See if this will actually work before backporting

> Acid tests with multiple splits
> -------------------------------
>
>                 Key: HIVE-17296
>                 URL: https://issues.apache.org/jira/browse/HIVE-17296
>             Project: Hive
>          Issue Type: Test
>          Components: Transactions
>    Affects Versions: 3.0.0
>            Reporter: Eugene Koifman
>            Assignee: Eugene Koifman
>            Priority: Critical
>
> data files in an Acid table are ORC files which may have multiple stripes
> for such files in base/ or delta/ (and original files with non acid to acid conversion) are split by OrcInputFormat into multiple (stripe sized) chunks.
> There is additional logic in in OrcRawRecordMerger (discoverKeyBounds/discoverOriginalKeyBounds) that is not tested by any E2E tests since none of the have enough data to generate multiple stripes in a single file.
> testRecordReaderOldBaseAndDelta/testRecordReaderNewBaseAndDelta/testOriginalReaderPair
> in TestOrcRawRecordMerger has some logic to test this but it really needs e2e tests.
> With ORC-228 it will be possible to write such tests.



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