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apache · Feb 10, 2020 · 38cd6da · 38cd6da
1 parent 363d8a2
commit 38cd6da
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
@@ -337,6 +337,8 @@ object DateTimeUtils {
 
   def microsToInstant(us: Long): Instant = {
     val secs = Math.floorDiv(us, MICROS_PER_SECOND)
+    // Unfolded Math.floorMod(us, MICROS_PER_SECOND) to reuse the result of
+    // the above calculation of `secs` via `floorDiv`.
     val mos = us - secs * MICROS_PER_SECOND
     Instant.ofEpochSecond(secs, mos * NANOS_PER_MICROS)
   }