paleolimbot commented on code in PR #13541:
URL: https://github.com/apache/arrow/pull/13541#discussion_r925521763


##########
r/src/compute-exec.cpp:
##########
@@ -125,6 +125,46 @@ std::shared_ptr<arrow::Schema> ExecNode_output_schema(
   return node->output_schema();
 }
 
+// [[arrow::export]]
+std::string ExecPlan_ToString(const std::shared_ptr<compute::ExecPlan>& plan) {
+  return plan->ToString();
+}
+
+// [[arrow::export]]
+std::string ExecPlan_ToStringWithSink(
+    const std::shared_ptr<compute::ExecPlan>& plan,
+    const std::shared_ptr<compute::ExecNode>& final_node, cpp11::list 
sort_options,
+    int64_t head = -1) {

Review Comment:
   I see - I believe the problem is that an ExecPlan is mutable and we're 
mutating it to print it! It may have been doing this before, too, though.



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