cloud-fan commented on a change in pull request #33413:
URL: https://github.com/apache/spark/pull/33413#discussion_r678816260
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File path:
external/avro/src/main/scala/org/apache/spark/sql/avro/AvroDeserializer.scala
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@@ -147,6 +147,21 @@ private[sql] class AvroDeserializer(
s"Avro logical type $other cannot be converted to SQL type
${TimestampType.sql}.")
}
+ case (LONG, TimestampNTZType) => avroType.getLogicalType match {
+ // For backward compatibility, if the Avro type is Long and it is not
logical type
+ // (the `null` case), the value is processed as timestamp without time
zone type
+ // with millisecond precision.
+ case null | _: LocalTimestampMillis => (updater, ordinal, value) =>
+ val millis = value.asInstanceOf[Long]
+ val micros = DateTimeUtils.millisToMicros(millis)
+ updater.setLong(ordinal, timestampRebaseFunc(micros))
Review comment:
It goes without saying that a modern system always uses Proleptic
Gregorian calendar. The rebase is only used to keep backward compatibility with
legacy Spark versions. This is a new data type and there is no backward
compatibility issues.
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