fix(spans): Add a description to the segment as well

CHANGELOG.md

@@ -30,6 +30,7 @@
 - Add a nanojoule unit for profile measurements. ([#2478](https://github.com/getsentry/relay/pull/2478))
 - Add a timestamp field to report profile's start time on Android. ([#2486](https://github.com/getsentry/relay/pull/2486))
 - Filter span metrics extraction based on features. ([#2511](https://github.com/getsentry/relay/pull/2511), [#2520](https://github.com/getsentry/relay/pull/2520))
+- Extract shared tags on the segment. ([#2512](https://github.com/getsentry/relay/pull/2512))
 
 ## 23.8.0
 

relay-event-normalization/src/normalize/span/tag_extraction.rs

@@ -119,7 +119,7 @@ pub(crate) fn extract_span_tags(event: &mut Event, config: &Config) {
 }
 
 /// Extracts tags shared by every span.
-fn extract_shared_tags(event: &Event) -> BTreeMap<SpanTagKey, Value> {
+pub fn extract_shared_tags(event: &Event) -> BTreeMap<SpanTagKey, Value> {
     let mut tags = BTreeMap::<SpanTagKey, Value>::new();
 
     if let Some(release) = event.release.as_str() {

relay-event-schema/src/protocol/span.rs

@@ -76,9 +76,10 @@ pub struct Span {
 impl From<&Event> for Span {
     fn from(event: &Event) -> Self {
         let mut span = Self {
-            timestamp: event.timestamp.clone(),
-            start_timestamp: event.start_timestamp.clone(),
+            description: event.transaction.clone(),
             is_segment: Some(true).into(),
+            start_timestamp: event.start_timestamp.clone(),
+            timestamp: event.timestamp.clone(),
             ..Default::default()
         };
 

relay-server/src/actors/processor.rs

@@ -54,7 +54,7 @@ use {
     crate::actors::envelopes::SendMetrics,
     crate::actors::project_cache::UpdateRateLimits,
     crate::utils::{EnvelopeLimiter, MetricsLimiter},
-    relay_event_normalization::{StoreConfig, StoreProcessor},
+    relay_event_normalization::{span, StoreConfig, StoreProcessor},
     relay_event_schema::protocol::ProfileContext,
     relay_quotas::{RateLimitingError, RedisRateLimiter},
     symbolic_unreal::{Unreal4Error, Unreal4ErrorKind},
@@ -2259,12 +2259,6 @@ impl EnvelopeProcessorService {
             return;
         };
 
-        // Extract transaction as a span.
-        let Some(event) = state.event.value() else {
-            return;
-        };
-        let transaction_span: Span = event.into();
-
         let mut add_span = |span: Annotated<Span>| {
             let span = match span.to_json() {
                 Ok(span) => span,
@@ -2278,6 +2272,13 @@ impl EnvelopeProcessorService {
             state.managed_envelope.envelope_mut().add_item(item);
         };
 
+        let Some(event) = state.event.value() else {
+            return;
+        };
+
+        // Extract transaction as a span.
+        let mut transaction_span: Span = event.into();
+
         let all_modules_enabled = state
             .project_state
             .has_feature(Feature::SpanMetricsExtractionAllModules);
@@ -2308,6 +2309,18 @@ impl EnvelopeProcessorService {
         }
 
         if all_modules_enabled {
+            // Extract tags to add to this span as well
+            let shared_tags = span::tag_extraction::extract_shared_tags(event);
+            let data = transaction_span
+                .data
+                .value_mut()
+                .get_or_insert_with(Default::default);
+            data.extend(
+                shared_tags
+                    .clone()
+                    .into_iter()
+                    .map(|(k, v)| (k.to_string(), Annotated::new(v))),
+            );
             add_span(transaction_span.into());
         }
     }

tests/integration/test_store.py

@@ -429,7 +429,9 @@ def test_processing_quotas(
     elif event_type == "error":
         transform = make_error
     else:
-        transform = lambda e: e
+
+        def transform(e):
+            return e
 
     for i in range(5):
         # send using the first dsn
@@ -1247,6 +1249,11 @@ def test_spans(
         "event_id": "cbf6960622e14a45abc1f03b2055b186",
         "project_id": 42,
         "span": {
+            "data": {
+                "transaction": "hi",
+                "transaction.op": "hi",
+            },
+            "description": "hi",
             "exclusive_time": 2000.0,
             "is_segment": True,
             "op": "hi",