diff --git a/Src/Asp.NetCore2/PgSqlTest/UnitTest/UnitSubToList.cs b/Src/Asp.NetCore2/PgSqlTest/UnitTest/UnitSubToList.cs
index aea719a9e..bd2e659b2 100644
--- a/Src/Asp.NetCore2/PgSqlTest/UnitTest/UnitSubToList.cs
+++ b/Src/Asp.NetCore2/PgSqlTest/UnitTest/UnitSubToList.cs
@@ -11,6 +11,17 @@ namespace OrmTest
         public static void Init()
         {
             var db = NewUnitTest.Db;
+            List<Guid> dis = new List<Guid>(); 
+ 
+            for (int i = 0; i < 100; i++)
+            {
+                var guids = db.Queryable<Order>().Select(it => 
+                 
+                      SqlFunc.NewUid()
+                ).Take(10) .ToList();
+                dis.AddRange(guids);
+            }
+            var count = dis.Distinct().Count();
             //   db.Aop.OnLogExecuting = null;
 
             db.CodeFirst.InitTables<Order, OrderItem, Custom>();
diff --git a/Src/Asp.NetCore2/SqlSeverTest/UnitTest/Unitfafaf231.cs b/Src/Asp.NetCore2/SqlSeverTest/UnitTest/Unitfafaf231.cs
index 054b2d534..3f08edd09 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/UnitTest/Unitfafaf231.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/UnitTest/Unitfafaf231.cs
@@ -38,6 +38,14 @@ namespace OrmTest
                     Date = x.CreateTime!.Value.Date,
                     SumPrice = SqlFunc.AggregateSum(x.Price)
                 }).MergeTable().ToList();
+             
+            for (int i = 0; i < 100; i++)
+            {
+                var guids = Db.Queryable<Order>().Select(it => new
+                {
+                    id = SqlFunc.NewUid()
+                }).Take(10).ToList(); 
+            }
 
             Console.WriteLine(list.Count);
         }
diff --git a/Src/Asp.NetCore2/SqliteTest/UnitTest/UnitSubToList.cs b/Src/Asp.NetCore2/SqliteTest/UnitTest/UnitSubToList.cs
index 5383a088c..df71c85df 100644
--- a/Src/Asp.NetCore2/SqliteTest/UnitTest/UnitSubToList.cs
+++ b/Src/Asp.NetCore2/SqliteTest/UnitTest/UnitSubToList.cs
@@ -11,6 +11,14 @@ namespace OrmTest
         public static void Init()
         {
             var db = NewUnitTest.Db;
+
+            for (int i = 0; i < 100; i++)
+            {
+                var guids = db.Queryable<Order>().Select(it => new
+                {
+                    id = SqlFunc.NewUid()
+                }).Take(10).ToList();
+            }
             //   db.Aop.OnLogExecuting = null;
 
             db.DbMaintenance.TruncateTable<Order, OrderItem, Custom>();