diff --git a/internal/distributed/proxy/httpserver/wrap_request.go b/internal/distributed/proxy/httpserver/wrap_request.go
index 489373eb1b..560c2fccbc 100644
--- a/internal/distributed/proxy/httpserver/wrap_request.go
+++ b/internal/distributed/proxy/httpserver/wrap_request.go
@@ -89,7 +89,7 @@ func (f FieldData) AsSchemapb() (*schemapb.FieldData, error) {
 				},
 			},
 		}
-	case schemapb.DataType_String:
+	case schemapb.DataType_VarChar:
 		if len(raw) > 0 {
 			_, ok := raw[0].(string)
 			if !ok {
diff --git a/internal/distributed/proxy/httpserver/wrap_request_test.go b/internal/distributed/proxy/httpserver/wrap_request_test.go
index b984b88907..ab93a68e04 100644
--- a/internal/distributed/proxy/httpserver/wrap_request_test.go
+++ b/internal/distributed/proxy/httpserver/wrap_request_test.go
@@ -10,9 +10,9 @@ import (
 )
 
 func TestFieldData_AsSchemapb(t *testing.T) {
-	t.Run("string_ok", func(t *testing.T) {
+	t.Run("varchar_ok", func(t *testing.T) {
 		fieldData := FieldData{
-			Type:  schemapb.DataType_String,
+			Type:  schemapb.DataType_VarChar,
 			Field: []interface{}{"a", "b", "c"},
 		}
 		raw, _ := json.Marshal(fieldData)
@@ -20,9 +20,9 @@ func TestFieldData_AsSchemapb(t *testing.T) {
 		_, err := fieldData.AsSchemapb()
 		assert.NoError(t, err)
 	})
-	t.Run("string_error", func(t *testing.T) {
+	t.Run("varchar_error", func(t *testing.T) {
 		fieldData := FieldData{
-			Type:  schemapb.DataType_String,
+			Type:  schemapb.DataType_VarChar,
 			Field: []interface{}{1, 2, 3},
 		}
 		raw, _ := json.Marshal(fieldData)
@@ -30,7 +30,6 @@ func TestFieldData_AsSchemapb(t *testing.T) {
 		_, err := fieldData.AsSchemapb()
 		assert.Error(t, err)
 	})
-
 	t.Run("bool_ok", func(t *testing.T) {
 		fieldData := FieldData{
 			Type:  schemapb.DataType_Bool,
@@ -152,9 +151,9 @@ func TestFieldData_AsSchemapb(t *testing.T) {
 		_, err := fieldData.AsSchemapb()
 		assert.Error(t, err)
 	})
-	t.Run("varchar_not_support", func(t *testing.T) {
+	t.Run("string_not_support", func(t *testing.T) {
 		fieldData := FieldData{
-			Type:  schemapb.DataType_VarChar,
+			Type:  schemapb.DataType_String,
 			Field: []interface{}{"a", "b", "c"},
 		}
 		raw, _ := json.Marshal(fieldData)