stevomitric commented on code in PR #57680:
URL: https://github.com/apache/spark/pull/57680#discussion_r3749706629
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala:
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@@ -4523,7 +4523,13 @@ case class SubtractTimestamps(
def this(endTimestamp: Expression, startTimestamp: Expression) =
this(endTimestamp, startTimestamp, SQLConf.get.legacyIntervalEnabled)
- override def inputTypes: Seq[AbstractDataType] = Seq(AnyTimestampType,
AnyTimestampType)
+ // Nanosecond-precision timestamps are accepted alongside the microsecond
types. The difference is
+ // always reported on the microsecond grid (a DayTimeIntervalType has
microsecond resolution), so
Review Comment:
Qualified as microsecond-grid
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