stevenzwu commented on code in PR #18394:
URL: https://github.com/apache/iceberg/pull/18394#discussion_r4192226353
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core/src/main/java/org/apache/iceberg/FieldStatsStruct.java:
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@@ -231,6 +232,9 @@ private static int[] posToOffset(Types.StructType struct) {
private static Object copyBound(Object bound) {
if (bound instanceof byte[] bytes) {
return copyOf(bytes);
+ } else if (bound instanceof GeospatialBound geo) {
+ // readers reuse one bound instance
+ return geo.copy();
} else if (bound instanceof StructLike struct) {
return StructLikeUtil.copy(struct);
Review Comment:
We kept the generic StructLike copy because
TestFieldStatsStruct.geoSerialization still builds lower and upper bounds as
PartitionData. FieldStats#copy needs StructLikeUtil.copy so the copy is not the
same instance. Dropping this branch fails the geometry and geography
FieldStats#copy cases on isNotSameAs. Other serializers in that test still pass
because the round trip allocates a new object.
We are exploring removing this branch and adjusting the unit tests to use
GeospatialBound instead of PartitionData.
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