scovich commented on code in PR #9141:
URL: https://github.com/apache/arrow-rs/pull/9141#discussion_r2683107912
##########
arrow-array/src/array/byte_array.rs:
##########
@@ -154,6 +154,30 @@ impl<T: ByteArrayType> GenericByteArray<T> {
})
}
+ /// It returns a new array with the same data and a new null buffer.
+ ///
+ /// The resulting null buffer is the union of the existing nulls and the
provided nulls.
+ /// In other words, a slot is valid in the result only if it is valid in
BOTH
+ /// the existing array AND the provided `nulls`.
+ ///
+ /// # Panics
+ ///
+ /// Panics if `nulls` has a different length than the array.
+ pub fn with_nulls(self, nulls: Option<NullBuffer>) -> Self {
+ if let Some(n) = &nulls {
+ assert_eq!(n.len(), self.len(), "Null buffer length mismatch");
+ }
+
+ let new_nulls = NullBuffer::union(self.nulls.as_ref(), nulls.as_ref());
+
+ Self {
+ data_type: T::DATA_TYPE,
Review Comment:
@alamb Is this is a valid observation/suggestion? What do you think?
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