jayzhan211 commented on code in PR #7897:
URL: https://github.com/apache/arrow-datafusion/pull/7897#discussion_r1386638277
##########
datafusion/expr/src/expr_fn.rs:
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@@ -704,6 +704,8 @@ scalar_expr!(
array delimiter,
"converts each element to its text representation."
);
+nary_scalar_expr!(ArrayUnion, array_union, "returns an array of the elements
in the union of array1 and array2 without duplicates.");
Review Comment:
should we use scalar_expr?
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