Zouxxyy commented on code in PR #49234:
URL: https://github.com/apache/spark/pull/49234#discussion_r1897070048
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sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetUtils.scala:
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@@ -420,6 +420,22 @@ object ParquetUtils extends Logging {
statistics.getNumNulls;
}
+ // Replaces each VariantType in the schema with the corresponding type in
the shredding schema.
+ // Used for testing, where we force a single shredding schema for all
Variant fields.
+ // Does not touch Variant fields nested in arrays, maps, or UDTs.
+ private def replaceVariantTypes(schema: StructType, shreddingSchema:
StructType): StructType = {
+ val newFields = schema.fields.zip(shreddingSchema.fields).map {
+ case (field, shreddingField) =>
+ field.dataType match {
+ case s: StructType =>
+ field.copy(dataType = replaceVariantTypes(s, shreddingSchema))
Review Comment:
Have you considered adding a property like `shreddedSchema` in
`VariantType`? This way, we won't need to determine how this struct type was
from. Currently, it seems that this is judged through
__VARIANT_WRITE_SHREDDING_KEY."
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