Update exp to sql

Src/Asp.Net/SqlServerTest/SqlServerTest.csproj

@@ -94,6 +94,7 @@
     <Compile Include="Models\OrderItem.cs" />
     <Compile Include="Demo\Demo0_SqlSugarClient.cs" />
     <Compile Include="Models\ViewOrder.cs" />
+    <Compile Include="UnitTest\UCustom01.cs" />
     <Compile Include="UnitTest\UDelete.cs" />
     <Compile Include="UnitTest\UFastest.cs" />
     <Compile Include="UnitTest\UConfig.cs" />

Src/Asp.Net/SqlServerTest/UnitTest/Main.cs

@@ -31,6 +31,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            UCustom01.Init();
             UConfig();
             DeleteTest();
             Fastest2();

Src/Asp.Net/SqlServerTest/UnitTest/UCustom01.cs

@@ -0,0 +1,71 @@
+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OrmTest
+{
+    public class UCustom01
+    {
+
+        public static void Init()
+        {
+            var db = new SqlSugarScope(new SqlSugar.ConnectionConfig()
+            {
+                ConnectionString = Config.ConnectionString,
+                DbType = DbType.SqlServer,
+                IsAutoCloseConnection = true
+            });
+            db.Aop.OnLogExecuted = (s, p) =>
+            {
+                Console.WriteLine(s);
+            };
+            //建表 
+            if (!db.DbMaintenance.IsAnyTable("User_Test001", false))
+            {
+                db.CodeFirst.InitTables<User_Test001>();
+            }
+            if (!db.DbMaintenance.IsAnyTable("UserRole_Test001", false))
+            {
+                db.CodeFirst.InitTables<UserRole_Test001>();
+            }
+
+            //用例代码 
+            var result = db.Queryable<User_Test001, UserRole_Test001>((u, ur) => new object[] {
+
+                            JoinType.Left,u.ID==ur.UserID
+
+
+
+                        }).Select((u, ur) => new
+
+                        {
+
+                            customName = SqlFunc.Subqueryable<User_Test001>().Where(s => s.UserName == u.UserName).Select(s => s.UserName+"")
+
+
+
+                        }).ToPageList(1, 10);
+
+            Console.WriteLine(result);
+            Console.WriteLine("用例跑完");
+            Console.ReadKey();
+        }
+        [SugarTable("unitUser_Test001")]
+        public class User_Test001
+        {
+
+            public int ID { get; set; }
+            public string UserName { get; set; }
+        }
+        [SugarTable("unitUserRole_Test001")]
+        public class UserRole_Test001
+        {
+
+            public int ID { get; set; }
+            public int UserID { get; set; }
+        }
+    }
+}

Src/Asp.Net/SqlSugar/ExpressionsToSql/ExpressionContext.cs

@@ -39,6 +39,7 @@ namespace SqlSugar
         public int Index { get; set; }
         public int ParameterIndex { get; set; }
         public string SingleTableNameSubqueryShortName{ get;  set; }
+        public string CurrentShortName { get; set; }
         public MappingColumnList MappingColumns { get; set; }
         public MappingTableList MappingTables { get; set; }
         public IgnoreColumnList IgnoreComumnList { get; set; }

Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubSelect.cs

@@ -49,10 +49,28 @@ namespace SqlSugar
                 this.Context.InitMappingInfo(entityType);
                 this.Context.RefreshMapping();
             }
-            if(this.Context.JoinIndex==0)
-               return SubTools.GetMethodValue(this.Context, exp.Arguments[0],ResolveExpressType.FieldSingle);
+            var result = "";
+            if (this.Context.JoinIndex == 0)
+                result = SubTools.GetMethodValue(this.Context, exp.Arguments[0], ResolveExpressType.FieldSingle);
             else
-              return SubTools.GetMethodValue(this.Context, exp.Arguments[0], ResolveExpressType.FieldMultiple);
+                result = SubTools.GetMethodValue(this.Context, exp.Arguments[0], ResolveExpressType.FieldMultiple);
+
+            SetShortName(exp, result);
+
+            return result;
+        }
+
+        private void SetShortName(MethodCallExpression exp, string result)
+        {
+            if (exp.Arguments[0] is LambdaExpression && result.IsContainsIn("+", "-"))
+            {
+                var parameters = (exp.Arguments[0] as LambdaExpression).Parameters;
+                if (parameters != null && parameters.Count > 0)
+                {
+                    this.Context.CurrentShortName = this.Context.SqlTranslationLeft + parameters[0] + this.Context.SqlTranslationRight;
+                }
+
+            }
         }
     }
 }

Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/SubResolve.cs

@@ -96,6 +96,10 @@ namespace SqlSugar
             {
                 GetSubAs(sqlItems, asItems);
             }
+            if (this.context.CurrentShortName.HasValue()) 
+            {
+                GetShortName(sqlItems);
+            }
             var sql = string.Join(UtilConstants.Space, sqlItems);
             return this.context.DbMehtods.Pack(sql);
         }
@@ -112,6 +116,16 @@ namespace SqlSugar
                 }
             }
         }
+        private void GetShortName(List<string> sqlItems)
+        {
+            for (int i = 0; i < sqlItems.Count; i++)
+            {
+                if (sqlItems[i].StartsWith("FROM " + this.context.SqlTranslationLeft))
+                {
+                    sqlItems[i] = sqlItems[i]+" "+this.context.CurrentShortName +" ";
+                }
+            }
+        }
 
         private List<string> GetSubItems()
         {