Update demo

Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/UQueryable2.cs

@@ -0,0 +1,101 @@
+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OrmTest
+{
+    public partial class NewUnitTest
+    {
+        public static void Queryable2()
+        {
+            var list4 = Db.Queryable<ABMapping>()
+                            .Mapper(it => it.A, it => it.AId)
+                            .Where(it => it.A.Name == "a")
+                            .ToList();
+
+
+            var list5 = Db.Queryable<ABMapping>()
+                   .Mapper(it => it.A, it => it.AId, it => it.A.Id)
+                   .Where(it => it.A.Name == "a")
+                   .ToList();
+
+
+            var list3 = Db.Queryable<Order>()
+                .Mapper(it => it.Items, it => it.Items.First().OrderId)
+                .Where(it => it.Items.Count() > 0)
+                .ToList();
+
+            var list6 = Db.Queryable<Order>()
+               .Mapper(it => it.Items, it => it.Items.First().OrderId)
+               .Where(it => it.Items.Any())
+               .ToList();
+            var list7= Db.Queryable<Order>()
+               .Mapper(it => it.Items, it => it.Items.First().OrderId)
+               .Where(it => it.Items.Any(y => y.ItemId == 1))
+               .ToList();
+
+            var sql=Db.Queryable<Order>().AS("[order]").ToList();
+
+            var sql1 = Db.Queryable<Order, OrderItem, Custom>((o, i, c) => new JoinQueryInfos(
+             JoinType.Left, o.Id == i.OrderId,
+             JoinType.Left, c.Id == o.CustomId
+            ))
+            .AS("[aa]")
+            .AS<OrderItem>("[xx]")
+            .AS<Custom>("[yy]")
+           .Select<ViewOrder>().ToSql().Key;
+            if (!sql1.Contains("[aa]") || !sql1.Contains("[xx]") || !sql1.Contains("[yy]"))
+            {
+                throw new Exception("unit queryable2 ");
+            }
+            var sql2 = Db.Queryable<OrderItem>().AS("[zz]").ToSql().Key;
+            if (sql2 != "SELECT [ItemId],[OrderId],[Price],[CreateTime] FROM [zz] ")
+            {
+                throw new Exception("unit queryable2 ");
+            }
+            Db.Queryable<Order, OrderItem, Custom>((o, i, c) => new JoinQueryInfos(
+             JoinType.Left, o.Id == i.OrderId,
+             JoinType.Left, c.Id == o.CustomId
+            ))
+            .AS("[order]")
+            .AS<OrderItem>("[orderdetail]")
+            .AS<Custom>("[custom]")
+           .Select<ViewOrder>().ToList();
+
+            Db.Queryable<object>().AS("[order]").Select("*").ToList();
+
+            var qu1=Db.Queryable<Order>().Select(it => new
+            {
+                id = it.Id
+            }).MergeTable().Select<Order>();
+            var qu2 = Db.Queryable<Order>().Select(it => new
+            {
+                id = it.Id,
+                name=it.Name
+            }).MergeTable().Select<Order>();
+            var list=Db.Queryable(qu1, qu2,JoinType.Left, (x, y) => x.Id == y.Id).Select((x,y) => new
+            {
+                id1=x.Id,
+                name=y.Name
+            }).ToList();
+
+            var qu3 = Db.Queryable<Order>().Select(it => new
+            {
+                id = it.Id,
+                name = it.Name
+            })
+                   .Where(it => 2 > it.id)
+            .MergeTable()
+         
+            .Select(it=> new Order() {
+                 Id=SqlFunc.IIF(2>it.id,1,2)
+            }).ToList();
+
+
+            var qu4 = Db.Queryable<Order>().OrderBy(it=>it.Id+it.Id).ToList();
+        }
+    }
+}