aokolnychyi commented on code in PR #7517:
URL: https://github.com/apache/iceberg/pull/7517#discussion_r1186429003
##########
api/src/main/java/org/apache/iceberg/util/StructProjection.java:
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@@ -189,16 +189,12 @@ public int size() {
@Override
public <T> T get(int pos, Class<T> javaClass) {
- if (struct == null) {
- // Return a null struct when projecting a nested required field from an
optional struct.
- // See more details in issue #2738.
- return null;
- }
-
int structPos = positionMap[pos];
-
if (nestedProjections[pos] != null) {
- return javaClass.cast(nestedProjections[pos].wrap(struct.get(structPos,
StructLike.class)));
+ StructLike nestedStruct = struct.get(structPos, StructLike.class);
Review Comment:
I agree about the behavior to return nested nulls without wrapping but I am
not sure it is a good idea to remove lines 192-196. This API is widely used and
it does not seem like a totally weird use case to wrap top-level nulls.
Otherwise, every caller would have to check if the passed value is null. If
someone has to do that check, better hide it inside this class.
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