sujith71955 edited a comment 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, WHEN WE ARE SETTING -1 AS DEFAULT VALUE BELOW LOGIC WILL CHANGE THE LAST ACCESS TIME VALUE TO '0' WHILE SAVING THE SAME IN HIVEMETASTORE, SEEMS TO BE BECAUSE OF BELOW LOGIC THE LAST ACCESS TIME CONDITION CHECK IS FAILING.  As you told no need to update the default value 0 instead we can save the Last Access Time value as -1 in metastore. Thanks for your suggestions Sean.
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