devinrsmith commented on code in PR #12887:
URL: https://github.com/apache/iceberg/pull/12887#discussion_r2058555214
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api/src/main/java/org/apache/iceberg/PartitionSpec.java:
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@@ -644,6 +646,16 @@ static void checkCompatibility(PartitionSpec spec, Schema
schema) {
"Invalid source type %s for transform: %s",
sourceType,
transform);
+ // The only valid parent types for a PartitionField are StructTypes.
This must be checked
+ // recursively.
+ int fieldId = field.sourceId();
+ Integer parentId;
+ while ((parentId = parents.get(fieldId)) != null) {
+ Type parentType = schema.findType(parentId);
+ ValidationException.check(
+ parentType.isStructType(), "Invalid partition field parent: %s",
parentType);
+ fieldId = parentId;
+ }
Review Comment:
I agree, and always happy to make things easier to read / understand.
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