lidavidm commented on a change in pull request #11466:
URL: https://github.com/apache/arrow/pull/11466#discussion_r741301925



##########
File path: cpp/src/arrow/compute/exec/expression.cc
##########
@@ -394,14 +394,13 @@ Result<Expression> BindImpl(Expression expr, const 
TypeOrSchema& in,
   if (expr.literal()) return expr;
 
   if (auto ref = expr.field_ref()) {
-    if (ref->IsNested()) {
-      return Status::NotImplemented("nested field references");
-    }
-
     ARROW_ASSIGN_OR_RAISE(auto path, ref->FindOne(in));
 
     auto bound = *expr.parameter();
-    bound.index = path[0];
+    bound.indices.resize(path.indices().size());
+    for (size_t i = 0; i < path.indices().size(); ++i) {
+      bound.indices[i] = path.indices()[i];
+    }

Review comment:
       Ah never mind that, I was being dumb about iterator vs container.




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