augustoasilva commented on a change in pull request #11166:
URL: https://github.com/apache/arrow/pull/11166#discussion_r742404778



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File path: cpp/src/gandiva/function_registry_string.cc
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@@ -88,6 +88,10 @@ std::vector<NativeFunction> GetStringFunctionRegistry() {
                      "gdv_fn_initcap_utf8",
                      NativeFunction::kNeedsContext | 
NativeFunction::kCanReturnErrors),
 
+      NativeFunction("elt", {}, DataTypeVector{int32(), utf8()}, utf8(),
+                     kResultNullIfNull, "gdv_fn_elt_utf8",
+                     NativeFunction::kNeedsContext | 
NativeFunction::kCanReturnErrors),

Review comment:
       It can return an error if it could not alocate the memory for the output 
and need the context to tag the error with it




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