cloud-fan commented on a change in pull request #27906: [SPARK-31150][SQL]
Parsing seconds fraction with variable length for timestamp
URL: https://github.com/apache/spark/pull/27906#discussion_r393106732
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeFormatterHelper.scala
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@@ -104,8 +111,40 @@ private object DateTimeFormatterHelper {
.withResolverStyle(ResolverStyle.STRICT)
}
- def buildFormatter(pattern: String, locale: Locale): DateTimeFormatter = {
- val builder = createBuilder().appendPattern(pattern)
+ /**
+ * Building a formatter for parsing seconds fraction with variable length
+ */
+ def appendPattern(
+ pattern: String,
+ builder: DateTimeFormatterBuilder): DateTimeFormatterBuilder = {
+ pattern.split("'").zipWithIndex.foreach {
+ case (pattenPart, idx) if idx % 2 == 0 =>
+ var rest = pattenPart
+ while (rest.nonEmpty) {
+ rest match {
+ case extractor(prefix, sss, suffix) =>
Review comment:
nit: `sss` -> `secondFraction`
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