diff --git a/entity/genidx/genidx.go b/entity/genidx/genidx.go
index 2f997bea..b99dad7d 100644
--- a/entity/genidx/genidx.go
+++ b/entity/genidx/genidx.go
@@ -710,7 +710,7 @@ func main() {
 			},
 			{
 				IdxName: "SCANN",
-				IdxType: entity.IvfFlat,
+				IdxType: entity.SCANN,
 				ConstructParams: []idxParam{
 					{
 						Name:           "nlist",
diff --git a/entity/indexes_gen.go b/entity/indexes_gen.go
index 0604c5b3..e4b84fe5 100755
--- a/entity/indexes_gen.go
+++ b/entity/indexes_gen.go
@@ -727,7 +727,7 @@ func NewIndexGPUIvfPQ(metricType MetricType,
 
 var _ Index = &IndexSCANN{}
 
-// IndexSCANN idx type for IVF_FLAT
+// IndexSCANN idx type for SCANN
 type IndexSCANN struct { //auto generated fields
 	nlist int
 	with_raw_data bool
@@ -741,7 +741,7 @@ func(i *IndexSCANN) Name() string {
 
 // IndexType returns IndexType, implementing Index interface
 func(i *IndexSCANN) IndexType() IndexType {
-	return IndexType("IVF_FLAT")
+	return IndexType("SCANN")
 }
 
 // SupportBinary returns whether index type support binary vector
diff --git a/entity/indexes_gen_test.go b/entity/indexes_gen_test.go
index cec8afb7..e7fce9fc 100755
--- a/entity/indexes_gen_test.go
+++ b/entity/indexes_gen_test.go
@@ -588,7 +588,7 @@ func TestIndexSCANN(t *testing.T){
 		assert.Nil(t, err)
 		assert.NotNil(t, idx0)
 		assert.Equal(t, "SCANN", idx0.Name())
-		assert.EqualValues(t, "IVF_FLAT", idx0.IndexType())
+		assert.EqualValues(t, "SCANN", idx0.IndexType())
 		assert.NotNil(t, idx0.Params())
 		assert.False(t, idx0.SupportBinary())
 		
@@ -600,7 +600,7 @@ func TestIndexSCANN(t *testing.T){
 		assert.Nil(t, err)
 		assert.NotNil(t, idx1)
 		assert.Equal(t, "SCANN", idx1.Name())
-		assert.EqualValues(t, "IVF_FLAT", idx1.IndexType())
+		assert.EqualValues(t, "SCANN", idx1.IndexType())
 		assert.NotNil(t, idx1.Params())
 		assert.False(t, idx1.SupportBinary())
 		
diff --git a/entity/indexes_search_param_gen.go b/entity/indexes_search_param_gen.go
index a5a8148c..1a8b6b23 100755
--- a/entity/indexes_search_param_gen.go
+++ b/entity/indexes_search_param_gen.go
@@ -382,7 +382,7 @@ func NewIndexGPUIvfPQSearchParam(
 
 var _ SearchParam = &IndexSCANNSearchParam{}
 
-// IndexSCANNSearchParam search param struct for index type IVF_FLAT
+// IndexSCANNSearchParam search param struct for index type SCANN
 type IndexSCANNSearchParam struct { //auto generated fields
 	baseSearchParams