lidavidm commented on code in PR #14244:
URL: https://github.com/apache/arrow/pull/14244#discussion_r982738981
##########
java/vector/src/main/codegen/templates/UnionVector.java:
##########
@@ -851,4 +851,13 @@ public void setInitialCapacity(int valueCount, double
density) {
}
}
}
+
+ /**
+ * Set the element at the given index to null. For DenseUnionVector, it is a
no-op as nulls are not supported at the
+ * top level, and isNull() always returns false. Nullability is only handled
at the level of individual child vectors.
+ *
+ * @param index position of element
+ */
+ @Override
+ public void setNull(int index) {}
Review Comment:
Or left unimplemented/abstract if possible
##########
java/vector/src/main/codegen/templates/DenseUnionVector.java:
##########
@@ -940,4 +940,13 @@ public void setInitialCapacity(int valueCount, double
density) {
}
}
}
+
+ /**
+ * Set the element at the given index to null. For DenseUnionVector, it is a
no-op as nulls are not supported at the
+ * top level, and isNull() always returns false. Nullability is only handled
at the level of individual child vectors.
Review Comment:
Could it also delegate to a child?
Also given this is a new method, I think an exception from the get-go is OK.
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