(arrow-rs) branch main updated: Fix interleave on zero-width FixedSizeListArray (#11026)

[jeffreyvo]

This is an automated email from the ASF dual-hosted git repository.

Jefffrey pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/arrow-rs.git


The following commit(s) were added to refs/heads/main by this push:
     new 8f00fb4b78 Fix interleave on zero-width FixedSizeListArray (#11026)
8f00fb4b78 is described below

commit 8f00fb4b785f912a91e90e760ec562f6533c5207
Author: Tim Poterba <tpote...@gmail.com>
AuthorDate: Tue Sep 8 19:43:53 2026 -0400

    Fix interleave on zero-width FixedSizeListArray (#11026)
    
    Broke in #10046. Same fix as #10915
    # Which issue does this PR close?
    <!--
    We generally require a GitHub issue to be filed for all bug fixes and
    enhancements and this helps us generate change logs for our releases.
    You can link an issue to this PR using the GitHub syntax.
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    - Closes #11025.
    
    # Rationale for this change
    (see issue).
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    # Are these changes tested?
    
    Yes.
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    # Are there any user-facing changes?
    Yes, this fixes interleave semantics to the semantics in v58.3, which I
    had before upgrading today.
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---
 arrow-select/src/interleave.rs | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/arrow-select/src/interleave.rs b/arrow-select/src/interleave.rs
index 2c476738c1..54f4412c5b 100644
--- a/arrow-select/src/interleave.rs
+++ b/arrow-select/src/interleave.rs
@@ -543,7 +543,13 @@ fn interleave_fixed_size_list(
         }
     };
 
-    let array = FixedSizeListArray::new(field.clone(), size, 
interleaved_values, interleaved.nulls);
+    let array = FixedSizeListArray::try_new_with_length(
+        field.clone(),
+        size,
+        interleaved_values,
+        interleaved.nulls,
+        indices.len(),
+    )?;
     Ok(Arc::new(array))
 }
 
@@ -2188,6 +2194,23 @@ mod tests {
         assert_eq!(values.values(), &[5, 6, 7, 8, 1, 2, 9, 10, 3, 4]);
     }
 
+    #[test]
+    fn test_interleave_zero_sized_fixed_size_list() {
+        let input = FixedSizeListArray::try_new_with_length(
+            Field::new_list_field(DataType::Int32, true).into(),
+            0,
+            Arc::new(Int32Array::new_null(0)),
+            None,
+            3,
+        )
+        .unwrap();
+
+        let indices = [(0, 2), (0, 0)];
+        let result = interleave(&[&input], &indices).unwrap();
+
+        assert_eq!(result.len(), 2);
+    }
+
     #[test]
     fn test_interleave_fixed_size_list_with_nulls() {
         let field = Arc::new(Field::new("item", DataType::Int32, true));