cloud-fan commented on a change in pull request #28650:
URL: https://github.com/apache/spark/pull/28650#discussion_r431680313
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
##########
@@ -859,127 +865,80 @@ case class UnixTimestamp(timeExp: Expression, format:
Expression, timeZoneId: Op
}
abstract class ToTimestamp
- extends BinaryExpression with TimeZoneAwareExpression with ExpectsInputTypes
{
+ extends BinaryExpression with TimestampFormatterHelper with
ExpectsInputTypes {
// The result of the conversion to timestamp is microseconds divided by this
factor.
// For example if the factor is 1000000, the result of the expression is in
seconds.
protected def downScaleFactor: Long
+ override protected def formatString: Expression = right
+ override protected def isParsing = true
+
override def inputTypes: Seq[AbstractDataType] =
Seq(TypeCollection(StringType, DateType, TimestampType), StringType)
override def dataType: DataType = LongType
override def nullable: Boolean = true
- private lazy val constFormat: UTF8String =
right.eval().asInstanceOf[UTF8String]
- private lazy val formatter: TimestampFormatter =
- try {
- TimestampFormatter(
- constFormat.toString,
- zoneId,
- legacyFormat = SIMPLE_DATE_FORMAT,
- needVarLengthSecondFraction = true)
- } catch {
- case e: SparkUpgradeException => throw e
- case NonFatal(_) => null
- }
-
override def eval(input: InternalRow): Any = {
- val t = left.eval(input)
- if (t == null) {
- null
- } else {
+ Option(left.eval(input)).map { t =>
left.dataType match {
- case DateType =>
- epochDaysToMicros(t.asInstanceOf[Int], zoneId) / downScaleFactor
- case TimestampType =>
- t.asInstanceOf[Long] / downScaleFactor
- case StringType if right.foldable =>
- if (constFormat == null || formatter == null) {
- null
- } else {
- try {
- formatter.parse(
- t.asInstanceOf[UTF8String].toString) / downScaleFactor
- } catch {
- case e: SparkUpgradeException => throw e
- case NonFatal(_) => null
- }
- }
+ case DateType => epochDaysToMicros(t.asInstanceOf[Int], zoneId) /
downScaleFactor
+ case TimestampType => t.asInstanceOf[Long] / downScaleFactor
case StringType =>
- val f = right.eval(input)
- if (f == null) {
- null
Review comment:
ditto
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