bjchambers commented on code in PR #23775:
URL: https://github.com/apache/datafusion/pull/23775#discussion_r3641021705
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datafusion/functions-nested/src/extract.rs:
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@@ -970,7 +970,7 @@ where
#[user_doc(
doc_section(label = "Array Functions"),
- description = "Returns the first non-null element in the array.",
+ description = "Returns the first non-null element in the array. Returns
NULL if the array is empty or all elements are NULL.",
Review Comment:
Done. I was thinking it was somewhat worthwhile since it's not necessarily
obvious what "Returns the first non-null element in the array." does if there
are no non-null elements in the array. But, agreed that `NULL` is the most
likely candidate.
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