lwhite1 commented on code in PR #14244:
URL: https://github.com/apache/arrow/pull/14244#discussion_r983617724
##########
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:
It needs to be implemented (or throw an exception) to make it possible to
use myArbitraryFieldVector.setNull() without casting for all the vector types
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