sujith71955 commented on issue #25720: [SPARK-28930][SQL] Last Access Time value shall display 'UNKNOWN' and 'null' values will be shown in its capitals 'NULL' for all clients URL: https://github.com/apache/spark/pull/25720#issuecomment-530024137 > I'm not sure this is a problem. These are different formats for the same info. In the case of a Spark DataFrame, `null` is correct, not the string `"NULL"`. - Fine, i got your point Sean. . I also don't see why last access time -1 needs to be 0? you are right, i thought '0' will make more readable. will revert it back. Thanks for your suggestions Sean.
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