diff --git a/internal/proxy/validate_util.go b/internal/proxy/validate_util.go
index e3ffa20ba81bc37d81d9a42fc1a1dfee913e5a2d..72706eaa5766b237687a1f31396d435e369bce8b 100644
--- a/internal/proxy/validate_util.go
+++ b/internal/proxy/validate_util.go
@@ -210,6 +210,7 @@ func validatePrimaryKey(coll *schemapb.CollectionSchema) error {
 	return nil
 }
 
+// RepeatedKeyValToMap transfer the kv pairs to map.
 func RepeatedKeyValToMap(kvPairs []*commonpb.KeyValuePair) (map[string]string, error) {
 	resMap := make(map[string]string)
 	for _, kv := range kvPairs {