Split table

Src/Asp.Net/SqlServerTest/Demo/DemoN_SplitTable.cs

@@ -25,11 +25,18 @@ namespace OrmTest
                 Console.WriteLine(s);
             };
 
+            //初始化分表
             db.CodeFirst.SplitTables().InitTables<OrderSpliteTest>();
-            var list=db.Queryable<OrderSpliteTest>().SplitTable(tabs => tabs.Take(3)).ToList();
 
+            //根据最近3个表进行查询
+            var list=db.Queryable<OrderSpliteTest>().Where(it=>it.Pk==Guid.NewGuid())
+                .SplitTable(tabs => tabs.Take(3))
+                .Where(it=>it.Time==DateTime.Now).ToOffsetPage(1,2);
+
+            //根据时间选出的表进行查询
             var list2 = db.Queryable<OrderSpliteTest>().SplitTable(tabs => tabs.Where(it=> it.Date>=DateTime.Now.AddYears(-2))).ToList();
 
+            //删除数据只在最近3张表执行操作
             var x = db.Deleteable<OrderSpliteTest>().Where(it=>it.Pk==Guid.NewGuid()).SplitTable(tabs => tabs.Take(3)).ExecuteCommand();
 
             var x2 = db.Updateable<OrderSpliteTest>()
@@ -38,7 +45,9 @@ namespace OrmTest
                 .SplitTable(tabs => tabs.Take(3))
                 .ExecuteCommand();
 
+            //按日分表 
             var x3 = db.Insertable(new OrderSpliteTest() { Name="A" }).SplitTable(SplitType.Day).ExecuteCommand();
+            //按日分表，根据time字段扔到对应的表中
             var x4 = db.Insertable(new OrderSpliteTest() { Name = "A" }).SplitTable(SplitType.Day,it=>it.Time).ExecuteCommand();
             Console.WriteLine("#### CodeFirst end ####");
         }

Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs

@@ -843,13 +843,15 @@ namespace SqlSugar
             };
             this.Context.MappingTables.Add(this.EntityInfo.EntityName, this.EntityInfo.DbTableName);
             var tables = getTableNamesFunc(helper.GetTables());
-            List<ISugarQueryable<object>> tableQueryables = new List<ISugarQueryable<object>>();
+            List<ISugarQueryable<T>> tableQueryables = new List<ISugarQueryable<T>>();
             foreach (var item in tables)
             {
-                tableQueryables.Add(this.Context.Queryable<object>().AS(item.TableName));
+                tableQueryables.Add(this.Clone().AS(item.TableName));
             }
-            var asName = this.Context.UnionAll(tableQueryables.ToArray()).QueryBuilder.GetTableNameString;
+            var unionall = this.Context._UnionAll(tableQueryables.ToArray());
-            return this.AS(asName);
+            //var values= unionall.QueryBuilder.GetSelectValue;
+            //unionall.QueryBuilder.SelectValue = values;
+            return unionall;
         }
         public ISugarQueryable<T> Distinct()
         {

Src/Asp.Net/SqlSugar/Abstract/SugarProvider/SqlSugarProvider.cs

@@ -504,6 +504,11 @@ namespace SqlSugar
         #endregion
 
         public virtual ISugarQueryable<T> UnionAll<T>(params ISugarQueryable<T>[] queryables) where T : class, new()
+        {
+            return _UnionAll(queryables);
+        }
+
+        internal ISugarQueryable<T> _UnionAll<T>(ISugarQueryable<T>[] queryables) 
         {
             var sqlBuilder = InstanceFactory.GetSqlbuilder(this.Context.CurrentConnectionConfig);
             Check.Exception(queryables.IsNullOrEmpty(), "UnionAll.queryables is null ");
@@ -533,6 +538,7 @@ namespace SqlSugar
                 return resulut.Select<T>(sqlBuilder.SqlSelectAll);
             }
         }
+
         public virtual ISugarQueryable<T> UnionAll<T>(List<ISugarQueryable<T>> queryables) where T : class, new()
         {
             Check.Exception(queryables.IsNullOrEmpty(), "UnionAll.queryables is null ");