pitrou commented on a change in pull request #9778:
URL: https://github.com/apache/arrow/pull/9778#discussion_r607015330
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File path: rust/arrow/src/array/ffi.rs
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@@ -55,11 +64,45 @@ impl TryFrom<ArrayData> for ffi::ArrowArray {
type Error = ArrowError;
fn try_from(value: ArrayData) -> Result<Self> {
+ // If parent is nullable, then children also must be nullable
+ // so we pass this nullable to the creation of hte child data
+ let nullable = match value.data_type() {
+ DataType::List(field) => field.is_nullable(),
+ DataType::LargeList(field) => field.is_nullable(),
+ _ => false,
+ };
+
let len = value.len();
let offset = value.offset() as usize;
let null_count = value.null_count();
let buffers = value.buffers().to_vec();
let null_buffer = value.null_buffer().cloned();
+ let child_data = value
+ .child_data()
+ .iter()
+ .map(|arr| {
+ let len = arr.len();
Review comment:
Well, you'll need to handle recursive types more generally anyway. Think
`list(list(int8))`.
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