cloud-fan commented on a change in pull request #26507: [WIP][SQL][2.4] Parse
timestamps in microsecond precision in JSON datasource
URL: https://github.com/apache/spark/pull/26507#discussion_r346215693
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
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@@ -1164,4 +1167,23 @@ object DateTimeUtils {
threadLocalTimestampFormat.remove()
threadLocalDateFormat.remove()
}
+
+ class MicrosCalendar(tz: TimeZone) extends GregorianCalendar(tz, Locale.US) {
+ def getMicros(digitsInFraction: Int): SQLTimestamp = {
Review comment:
IIUC, here we are trying to simulate the Java 8 DateTimeFormatter behavior,
although we use FastDateFormat under the hood.
what's the behavior of java 8 DateTimeFormatter if the actual value has more
digits in the fraction than the number of `S` in the format string?
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