Github user saucam commented on a diff in the pull request:
https://github.com/apache/spark/pull/4469#discussion_r24315891
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/types/dataTypes.scala ---
@@ -362,7 +362,7 @@ case object BooleanType extends NativeType with
PrimitiveType {
* @group dataType
*/
@DeveloperApi
-case object TimestampType extends NativeType {
+case object TimestampType extends NativeType with PrimitiveType {
--- End diff --
this is done, in case table is partitioned on a timestamp type column,
parquet iterator returns a GenericRow due to this in ParquetTypes.scala :
def isPrimitiveType(ctype: DataType): Boolean =
classOf[PrimitiveType] isAssignableFrom ctype.getClass
and in ParquetConverter.scala we have :
protected[parquet] def createRootConverter(
parquetSchema: MessageType,
attributes: Seq[Attribute]): CatalystConverter = {
// For non-nested types we use the optimized Row converter
if (attributes.forall(a =>
ParquetTypesConverter.isPrimitiveType(a.dataType))) {
new CatalystPrimitiveRowConverter(attributes.toArray)
} else {
new CatalystGroupConverter(attributes.toArray)
}
}
which fails here later :
new Iterator[Row] {
def hasNext = iter.hasNext
def next() = {
val row = iter.next()._2.asInstanceOf[SpecificMutableRow]
throwing a class cast exception that GenericRow cannot be cast to
SpecificMutableRow
Am I missing something here ?
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