Github user wzhfy commented on a diff in the pull request: https://github.com/apache/spark/pull/19479#discussion_r147886882 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/Statistics.scala --- @@ -177,13 +180,12 @@ object ColumnStat extends Logging { Some(ColumnStat( distinctCount = BigInt(map(KEY_DISTINCT_COUNT).toLong), // Note that flatMap(Option.apply) turns Option(null) into None. - min = map.get(KEY_MIN_VALUE) - .map(fromExternalString(_, field.name, field.dataType)).flatMap(Option.apply), - max = map.get(KEY_MAX_VALUE) - .map(fromExternalString(_, field.name, field.dataType)).flatMap(Option.apply), + min = map.get(KEY_MIN_VALUE).map(fromString(_, field.name, field.dataType)), + max = map.get(KEY_MAX_VALUE).map(fromString(_, field.name, field.dataType)), --- End diff -- Yea, but I tend to revert the change because keep `flatMap(Option.apply)` is more robust.
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