lidavidm commented on code in PR #12702:
URL: https://github.com/apache/arrow/pull/12702#discussion_r854492467
##########
cpp/src/arrow/util/tracing_internal.h:
##########
@@ -114,23 +117,38 @@ class SpanImpl {
opentelemetry::trace::StartSpanOptions SpanOptionsWithParent(
const util::tracing::Span& parent_span);
-#define START_SPAN(target_span, ...)
\
- auto opentelemetry_scope##__LINE__ =
\
- ::arrow::internal::tracing::GetTracer()->WithActiveSpan(
\
- target_span
\
- .Set(::arrow::util::tracing::Span::Impl{
\
-
::arrow::internal::tracing::GetTracer()->StartSpan(__VA_ARGS__)}) \
- .span)
+#define FIRST_ARG(first, ...) first
+
+#define START_COMPUTE_SPAN(target_span, ...) \
+ START_SPAN(target_span, __VA_ARGS__); \
+ START_SPAN(target_span, FIRST_ARG(__VA_ARGS__), {GET_MEMORY_POOL_INFO});
Review Comment:
Ah I see now. START_SPAN is just activating the span. I think what you want
is a macro to attach a new attribute to the span, not repeating the START_SPAN
macro.
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