Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/9502#discussion_r44081664
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
---
@@ -393,28 +393,35 @@ object DateTimeUtils {
}
/**
+ * Returns the microseconds since year zero (-17999).
+ */
+ def absoluteMicroSeconds(us: SQLTimestamp): SQLTimestamp = {
+ us + toYearZero * MICROS_PER_DAY
+ }
+
+ /**
* Returns the hour value of a given timestamp value. The timestamp is
expressed in microseconds.
*/
- def getHours(timestamp: SQLTimestamp): Int = {
- val localTs = (timestamp / 1000) + defaultTimeZone.getOffset(timestamp
/ 1000)
- ((localTs / 1000 / 3600) % 24).toInt
+ def getHours(us: SQLTimestamp): Int = {
+ val localTs = absoluteMicroSeconds(us) + defaultTimeZone.getOffset(us
/ 1000) * 1000L
+ ((localTs / MICROS_PER_SECOND / 3600) % 24).toInt
--- End diff --
Those two will be only used here, I'd like not to define them.
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