[receiver/datadog] Add support for db tags

Author: xiu

receiver/datadogreceiver/internal/translator/tags.go

@@ -63,6 +63,12 @@ var datadogKnownResourceAttributes = map[string]string{
 	"http.url":                     semconv.AttributeURLFull,
 	"http.useragent":               semconv.AttributeUserAgentOriginal,
 
+	// DB
+	"db.type":      semconv.AttributeDBSystem,
+	"db.operation": semconv.AttributeDBOperationName,
+	"db.instance":  semconv.AttributeDBCollectionName,
+	"db.pool.name": semconv.AttributeDBClientConnectionPoolName,
+
 	// Other
 	"process_id":       semconv.AttributeProcessPID,
 	"error.stacktrace": semconv.AttributeExceptionStacktrace,

receiver/datadogreceiver/internal/translator/traces_translator.go

@@ -60,6 +60,8 @@ func upsertHeadersAttributes(req *http.Request, attrs pcommon.Map) {
 func getSpanName(span *pb.Span) string {
 	if span.Name == "servlet.request" || span.Name == "spring.handler" {
 		return span.Resource
+	} else if val, ok := span.Meta["_dd.base_service"]; ok && span.Name == "postgresql.query" {
+		return val
 	}
 	return span.Name
 }