diff --git a/internal/querycoord/impl.go b/internal/querycoord/impl.go
index 19c1c937b936e7bfab6428089345b60e21d18c64..50b0f10c4abb2ba4031bbc13fd1e91a648caa57a 100644
--- a/internal/querycoord/impl.go
+++ b/internal/querycoord/impl.go
@@ -124,6 +124,7 @@ func (qc *QueryCoord) ShowCollections(ctx context.Context, req *querypb.ShowColl
 	}, nil
 }
 
+// LoadCollection loads all the sealed segments of this collection to queryNodes, and assigns watchDmChannelRequest to queryNodes
 func (qc *QueryCoord) LoadCollection(ctx context.Context, req *querypb.LoadCollectionRequest) (*commonpb.Status, error) {
 	collectionID := req.CollectionID
 	//schema := req.Schema