paleolimbot commented on code in PR #13541:
URL: https://github.com/apache/arrow/pull/13541#discussion_r925888709
##########
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 think it would have to be a `std::pair<ExecPlain, RecordBatchReader>` like
in the UDFs PR, but I also think that this was a rabbit hole that I shouldn't
have led you down...the simpler solution is to add a `ExecPlan_ToString()`
method like you had before and just call it after `ExecPlan_run()`. The
downside of that is that you will end up calling `plan->StartProducing()` when
you don't actually intend to consume any batches from the output. Perhaps a
good way to get this work merged sooner rather than later would be to mark that
as a follow-up (explain query without starting to produce).
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