sujith71955 commented on issue #25720: [SPARK-28930][SQL] Last Access Time value shall display 'UNKNOWN' in all clients URL: https://github.com/apache/spark/pull/25720#issuecomment-531625336 > I still don't quite understand it, are you trying to fix a cosmetic issue or a bug? I don't see a test that now passes with this change but didn't before. But I am also not clear that "UNKNOWN" or "NULL" is the desired output, either. After fixing JIRA SPARK-24812 the expectation is 'Last Access' shall be displayed as 'UNKNOWN' which is not happening right now as the value is shown as [Last Access,Thu Jan 01 08:00:00 CST 1970]. As analyzed i found the current logic if (-1 == lastAccessTime) "UNKNOWN" else new Date(lastAccessTime).toString is failing as the Last Access value will be coming as '0', its happens because of below logic which is executed in HiveClientImpl.toHiveTable() method. . So i corrected it. Its basically a cosmetic bug. Even in hive (verified in 1.2) the last access will be shown as 'UNKNOWN' because currently no mechanism for evaluating last access.
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