Gopal V commented on HIVE-21460:

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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