diff --git a/Src/Asp.NetCore2/PgSqlTest/UserTestCases/Main.cs b/Src/Asp.NetCore2/PgSqlTest/UserTestCases/Main.cs
index 7a43646f9..a9749a433 100644
--- a/Src/Asp.NetCore2/PgSqlTest/UserTestCases/Main.cs
+++ b/Src/Asp.NetCore2/PgSqlTest/UserTestCases/Main.cs
@@ -31,6 +31,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            UnitWeek.Init();
             UnitTestOneToOne.Init();
             Unitadfafafasd.Init();
             UnitSubToList.Init();
diff --git a/Src/Asp.NetCore2/PgSqlTest/UserTestCases/UnitWeek.cs b/Src/Asp.NetCore2/PgSqlTest/UserTestCases/UnitWeek.cs
new file mode 100644
index 000000000..117a72976
--- /dev/null
+++ b/Src/Asp.NetCore2/PgSqlTest/UserTestCases/UnitWeek.cs
@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OrmTest
+{
+    public class UnitWeek
+    {
+        public static void Init()
+        {
+            var db = NewUnitTest.Db;
+
+            for (int i = 0; i < 20; i++)
+            {
+                var date = DateTime.Now.AddDays(i);
+                var id = db.Insertable(new Order()
+                {
+                    CreateTime = date,
+                    CustomId = 1,
+                    Name = "a",
+                    Price = 1
+                })
+               .ExecuteReturnIdentity();
+
+                var data1 = db.Queryable<Order>()
+                    .In(id).Select(it => it.CreateTime.DayOfWeek).Single();
+                Console.WriteLine(db.Queryable<Order>()
+                    .In(id).Select(it => it.CreateTime).Single());
+                if (data1 != date.DayOfWeek)
+                {
+                    throw new Exception("DayOfWeek error");
+                }  
+            }
+        }
+    }
+}