felipecrv commented on code in PR #35514:
URL: https://github.com/apache/arrow/pull/35514#discussion_r1213239747


##########
cpp/src/arrow/engine/substrait/extension_set.cc:
##########
@@ -979,23 +981,22 @@ ExtensionIdRegistry::SubstraitAggregateToArrow 
DecodeBasicAggregate(
             options = std::make_shared<compute::VarianceOptions>(ddof);
           }
         }
-        fixed_arrow_func += arrow_function_name;
 
-        ARROW_ASSIGN_OR_RAISE(compute::Expression arg, call.GetValueArg(0));
-        const FieldRef* arg_ref = arg.field_ref();
-        if (!arg_ref) {
-          return Status::Invalid("Expected an aggregate call ", call.id().uri, 
"#",
-                                 call.id().name, " to have a direct 
reference");
+        fixed_arrow_func += arrow_function_name;

Review Comment:
   To keep the line glued to the previous block as it was before. It's a 
nitpick, but makes a potential function extraction in the future more obvious.



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