jayzhan211 commented on code in PR #13623:
URL: https://github.com/apache/datafusion/pull/13623#discussion_r1866809443
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datafusion/common/src/utils/mod.rs:
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@@ -321,89 +321,180 @@ pub fn longest_consecutive_prefix<T: Borrow<usize>>(
count
}
+/// Creates single element [`ListArray`], [`LargeListArray`] and
+/// [`FixedSizeListArray`] from other arrays
+///
+/// For example this builder can convert `[1, 2, 3]` into `[[1, 2, 3]]`
+///
+/// # Example
+/// ```
+/// # use std::sync::Arc;
+/// # use arrow_array::{Array, ListArray};
+/// # use arrow_array::types::Int64Type;
+/// # use datafusion_common::utils::SingleRowArrayBuilder;
+/// // Array is [1, 2, 3]
+/// let arr = ListArray::from_iter_primitive::<Int64Type, _, _>(vec![
+/// Some(vec![Some(1), Some(2), Some(3)]),
+/// ]);
+/// // Wrap as a list array: [[1, 2, 3]]
+/// let list_arr =
SingleRowArrayBuilder::new(Arc::new(arr)).build_list_array();
+/// assert_eq!(list_arr.len(), 1);
+/// ```
+#[derive(Debug, Clone)]
+pub struct SingleRowArrayBuilder {
Review Comment:
It seems this builder is for List, maybe name with
`SingleRowListArrayBuilder` is more concise?
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