diff --git a/internal/distributed/proxy/httpserver/utils.go b/internal/distributed/proxy/httpserver/utils.go
index 2384ff2cee..8a8a330f4e 100644
--- a/internal/distributed/proxy/httpserver/utils.go
+++ b/internal/distributed/proxy/httpserver/utils.go
@@ -102,7 +102,7 @@ func convertRange(field *schemapb.FieldSchema, result gjson.Result) (string, err
 			if err != nil {
 				return "", err
 			}
-			dataArray = append(dataArray, value)
+			dataArray = append(dataArray, fmt.Sprintf(`"%s"`, value))
 		}
 		resultStr = joinArray(dataArray)
 	}
diff --git a/internal/distributed/proxy/httpserver/utils_test.go b/internal/distributed/proxy/httpserver/utils_test.go
index 187e269b76..3333db1109 100644
--- a/internal/distributed/proxy/httpserver/utils_test.go
+++ b/internal/distributed/proxy/httpserver/utils_test.go
@@ -340,10 +340,11 @@ func TestPrimaryField(t *testing.T) {
 	idStr = gjson.Get(jsonStr, "id")
 	rangeStr, err = convertRange(&primaryField, idStr)
 	assert.Equal(t, nil, err)
-	assert.Equal(t, "1,2,3", rangeStr)
-	filter, err = checkGetPrimaryKey(coll, idStr)
+	assert.Equal(t, `"1","2","3"`, rangeStr)
+	coll2 := generateCollectionSchema(schemapb.DataType_VarChar, false)
+	filter, err = checkGetPrimaryKey(coll2, idStr)
 	assert.Equal(t, nil, err)
-	assert.Equal(t, "book_id in [1,2,3]", filter)
+	assert.Equal(t, `book_id in ["1","2","3"]`, filter)
 }
 
 func TestInsertWithDynamicFields(t *testing.T) {