[jira] [Created] (HIVE-21460) ACID: Load data followed by a select * query results in incorrect results

["Vaibhav Gumashta (JIRA)" <ji...@apache.org>]

Vaibhav Gumashta created HIVE-21460:
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             Summary: 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: 3.1.1
            Reporter: Vaibhav Gumashta


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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