MaxGekk commented on a change in pull request #28481:
URL: https://github.com/apache/spark/pull/28481#discussion_r422799964
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File path:
sql/catalyst/src/test/scala/org/apache/spark/sql/RandomDataGenerator.scala
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@@ -162,52 +162,66 @@ object RandomDataGenerator {
})
case BooleanType => Some(() => rand.nextBoolean())
case DateType =>
- val generator =
- () => {
- var milliseconds = rand.nextLong() % 253402329599999L
- // -62135740800000L is the number of milliseconds before January
1, 1970, 00:00:00 GMT
- // for "0001-01-01 00:00:00.000000". We need to find a
- // number that is greater or equals to this number as a valid
timestamp value.
- while (milliseconds < -62135740800000L) {
- // 253402329599999L is the number of milliseconds since
- // January 1, 1970, 00:00:00 GMT for "9999-12-31
23:59:59.999999".
- milliseconds = rand.nextLong() % 253402329599999L
- }
- val date = DateTimeUtils.toJavaDate((milliseconds /
MILLIS_PER_DAY).toInt)
- // The generated `date` is based on the hybrid calendar Julian +
Gregorian since
- // 1582-10-15 but it should be valid in Proleptic Gregorian
calendar too which is used
- // by Spark SQL since version 3.0 (see SPARK-26651). We try to
convert `date` to
- // a local date in Proleptic Gregorian calendar to satisfy this
requirement.
- // Some years are leap years in Julian calendar but not in
Proleptic Gregorian calendar.
- // As the consequence of that, 29 February of such years might not
exist in Proleptic
- // Gregorian calendar. When this happens, we shift the date by one
day.
- Try { date.toLocalDate; date }.getOrElse(new Date(date.getTime +
MILLIS_PER_DAY))
+ def uniformDateRand(rand: Random): java.sql.Date = {
+ var milliseconds = rand.nextLong() % 253402329599999L
+ // -62135740800000L is the number of milliseconds before January 1,
1970, 00:00:00 GMT
+ // for "0001-01-01 00:00:00.000000". We need to find a
+ // number that is greater or equals to this number as a valid
timestamp value.
Review comment:
Officially, not. See descriptions of TimestampType and DateType.
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