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https://issues.apache.org/jira/browse/HIVE-21460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16796350#comment-16796350
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Gopal V commented on HIVE-21460:
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LGTM - +1
(backport to 3.x branch too)
> ACID: Load data followed by a select * query results in incorrect results
> -------------------------------------------------------------------------
>
> Key: HIVE-21460
> URL: https://issues.apache.org/jira/browse/HIVE-21460
> Project: Hive
> Issue Type: Bug
> Components: Transactions
> Affects Versions: 4.0.0, 3.1.1
> Reporter: Vaibhav Gumashta
> Assignee: Vaibhav Gumashta
> Priority: Blocker
> Attachments: HIVE-21460.1.patch
>
>
> This affects current master as well. Created an orc file such that it spans
> multiple stripes and ran a simple select *, and got incorrect row counts
> (when comparing with select count(*). The problem seems to be that after
> split generation and creating min/max rowId for each row (note that since the
> loaded file is not written by Hive ACID, it does not have ROW__ID in the
> file; but the ROW__ID is applied on read by discovering min/max bounds which
> are used for calculating ROW__ID.rowId for each row of a split), Hive is only
> reading the last split.
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