diff --git a/internal/storage/data_codec.go b/internal/storage/data_codec.go
index 5262858f93803..10f29178722b5 100644
--- a/internal/storage/data_codec.go
+++ b/internal/storage/data_codec.go
@@ -253,25 +253,10 @@ func (insertCodec *InsertCodec) Serialize(partitionID UniqueID, segmentID Unique
 		var dim int64
 		if typeutil.IsVectorType(field.DataType) {
 			switch field.DataType {
-			case schemapb.DataType_FloatVector:
-				dim, err = typeutil.GetDim(field)
-				if err != nil {
-					return nil, err
-				}
-				eventWriter, err = writer.NextInsertEventWriter(int(dim))
-			case schemapb.DataType_BinaryVector:
-				dim, err = typeutil.GetDim(field)
-				if err != nil {
-					return nil, err
-				}
-				eventWriter, err = writer.NextInsertEventWriter(int(dim))
-			case schemapb.DataType_Float16Vector:
-				dim, err = typeutil.GetDim(field)
-				if err != nil {
-					return nil, err
-				}
-				eventWriter, err = writer.NextInsertEventWriter(int(dim))
-			case schemapb.DataType_BFloat16Vector:
+			case schemapb.DataType_FloatVector,
+				schemapb.DataType_BinaryVector,
+				schemapb.DataType_Float16Vector,
+				schemapb.DataType_BFloat16Vector:
 				dim, err = typeutil.GetDim(field)
 				if err != nil {
 					return nil, err
@@ -405,7 +390,7 @@ func AddFieldDataToPayload(eventWriter *insertEventWriter, dataType schemapb.Dat
 	default:
 		return fmt.Errorf("undefined data type %d", dataType)
 	}
-	return fmt.Errorf("undefined data type %d", dataType)
+	return nil
 }
 
 func (insertCodec *InsertCodec) DeserializeAll(blobs []*Blob) (