Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/8674#discussion_r39107075
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
---
@@ -192,11 +193,10 @@ object DateTimeUtils {
* Returns Julian day and nanoseconds in a day from the number of
microseconds
*/
def toJulianDay(us: SQLTimestamp): (Int, Long) = {
- val seconds = us / MICROS_PER_SECOND
- val day = seconds / SECONDS_PER_DAY + JULIAN_DAY_OF_EPOCH
- val secondsInDay = seconds % SECONDS_PER_DAY
- val nanos = (us % MICROS_PER_SECOND) * 1000L
- (day.toInt, secondsInDay * NANOS_PER_SECOND + nanos)
+ val julian_us = us + JULIAN_DAY_OF_EPOCH * MICROS_PER_DAY
--- End diff --
Without the checks I'm adding in #8606 this can overflow and write garbage
to the file...
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