diff --git a/internal/distributed/datacoord/service.go b/internal/distributed/datacoord/service.go
index c8f8367451..31cd2bb0bb 100644
--- a/internal/distributed/datacoord/service.go
+++ b/internal/distributed/datacoord/service.go
@@ -215,6 +215,7 @@ func (s *Server) GetInsertBinlogPaths(ctx context.Context, req *datapb.GetInsert
 	return s.dataCoord.GetInsertBinlogPaths(ctx, req)
 }
 
+// GetCollectionStatistics gets statistics of a collection
 func (s *Server) GetCollectionStatistics(ctx context.Context, req *datapb.GetCollectionStatisticsRequest) (*datapb.GetCollectionStatisticsResponse, error) {
 	return s.dataCoord.GetCollectionStatistics(ctx, req)
 }