Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/17202#discussion_r104907760 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala --- @@ -576,6 +576,11 @@ class Dataset[T] private[sql]( val parsedDelay = Option(CalendarInterval.fromString("interval " + delayThreshold)) .getOrElse(throw new AnalysisException(s"Unable to parse time delay '$delayThreshold'")) + val delayMs = { + val millisPerMonth = CalendarInterval.MICROS_PER_DAY / 1000 * 31 + parsedDelay.milliseconds + parsedDelay.months * millisPerMonth + } + assert(delayMs >= 0, s"delay threshold should not be a negative time: $delayThreshold") --- End diff -- Ah right. Can you not assert about parsedDelay then? it seems like that's always negative when the result of this conversion, copied from somewhere else? is negative.
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