samuelcolvin commented on code in PR #11321:
URL: https://github.com/apache/datafusion/pull/11321#discussion_r1668257787
##########
datafusion/physical-expr/src/expressions/is_null.rs:
##########
@@ -100,6 +110,49 @@ impl PhysicalExpr for IsNullExpr {
}
}
+pub(crate) fn union_is_null(union_array: &UnionArray) -> Result<BooleanArray> {
+ if let Some(offsets) = union_array.offsets() {
+ dense_union_is_null(union_array, offsets)
+ } else {
+ sparce_union_is_null(union_array)
+ }
+}
+
+fn dense_union_is_null(
+ union_array: &UnionArray,
+ offsets: &ScalarBuffer<i32>,
+) -> Result<BooleanArray> {
+ let child_arrays = (0..union_array.type_names().len())
+ .map(|type_id| {
+ compute::is_null(&union_array.child(type_id as
i8)).map_err(Into::into)
+ })
+ .collect::<Result<Vec<BooleanArray>>>()?;
+
+ let buffer: BooleanBuffer = offsets
+ .iter()
+ .zip(union_array.type_ids())
+ .map(|(offset, type_id)| child_arrays[*type_id as usize].value(*offset
as usize))
+ .collect();
+
+ Ok(BooleanArray::new(buffer, None))
+}
+
+fn sparce_union_is_null(union_array: &UnionArray) -> Result<BooleanArray> {
Review Comment:
done.
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