rdblue commented on code in PR #13445:
URL: https://github.com/apache/iceberg/pull/13445#discussion_r2274439584
##########
spark/v3.5/spark/src/main/java/org/apache/iceberg/spark/data/SparkParquetWriters.java:
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@@ -63,8 +64,9 @@ private SparkParquetWriters() {}
@SuppressWarnings("unchecked")
public static <T> ParquetValueWriter<T> buildWriter(StructType dfSchema,
MessageType type) {
+ StructType writeSchema = PruneNullType.prune(dfSchema);
Review Comment:
Ah, assuming that the Iceberg schema is coming from
`SparkFileWriterFactory`, it should be the already-pruned data schema.
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