RussellSpitzer commented on code in PR #10020:
URL: https://github.com/apache/iceberg/pull/10020#discussion_r1593088012


##########
api/src/main/java/org/apache/iceberg/PartitionSpec.java:
##########
@@ -140,6 +141,31 @@ public StructType partitionType() {
     return lazyPartitionType;
   }
 
+  public StructType originalPartitionType() {
+    if (schema.idsToOriginal().size() == 0) {
+      return partitionType();
+    }
+    if (lazyOriginalPartitionType == null) {
+      synchronized (this) {
+        if (lazyOriginalPartitionType == null) {
+          List<Types.NestedField> structFields = 
Lists.newArrayListWithExpectedSize(fields.length);
+
+          for (PartitionField field : fields) {
+            Type sourceType = schema.findType(field.sourceId());

Review Comment:
   Do we not have a copy constructor here? Seems like we are doing a lot of 
lookups here for just reassigning the id.



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