- 增加 WithMemory 基于内存查询；

Examples/base_entity/Program.cs

@@ -345,6 +345,25 @@ namespace base_entity
             BaseEntity.Initialization(fsql, () => _asyncUow.Value);
             #endregion
 
+            var list = new List<User1>();
+            list.Add(new User1 { Id = Guid.NewGuid() });
+            list.Add(new User1 { Id = Guid.NewGuid() });
+            list.Add(new User1 { Id = Guid.NewGuid() });
+
+            var listSql = fsql.Select<User1>()
+                .WithMemory(list)
+                .ToSql();
+
+            var listSql2 = fsql.Select<UserGroup>()
+                .FromQuery(fsql.Select<User1>().WithMemory(list))
+                .InnerJoin((a, b) => a.Id == b.GroupId)
+                .ToSql();
+
+            var listSql2Result = fsql.Select<UserGroup>()
+                .FromQuery(fsql.Select<User1>().WithMemory(list))
+                .InnerJoin((a, b) => a.Id == b.GroupId)
+                .ToList();
+
             var anysql01 = fsql.Select<Permission>().Where(a => a.Roles.Any(b => b.Users.Any(c => c.UserName == "admin"))).ToSql();
 
             var atimpl = fsql.CodeFirst.GetTableByEntity(typeof(AsTableLog))

FreeSql/FreeSql.xml

@@ -2627,6 +2627,13 @@
             <param name="parms">参数</param>
             <returns></returns>
         </member>
+        <member name="M:FreeSql.ISelect`1.WithMemory(System.Collections.Generic.IEnumerable{`0})">
+            <summary>
+            实现 select .. from ( select .. UNION ALL select .. ) a 这样的功能（基于内存数据）
+            </summary>
+            <param name="source">内存数据</param>
+            <returns></returns>
+        </member>
         <member name="M:FreeSql.ISelect`1.WithTempQuery``1(System.Linq.Expressions.Expression{System.Func{`0,``0}})">
             <summary>
             嵌套查询 select * from ( select ... from table ... ) a

FreeSql/Interface/Curd/ISelect/ISelect1.cs

@@ -369,6 +369,12 @@ namespace FreeSql
         /// <param name="parms">参数</param>
         /// <returns></returns>
         ISelect<T1> WithSql(string sql, object parms = null);
+        /// <summary>
+        /// 实现 select .. from ( select .. UNION ALL select .. ) a 这样的功能（基于内存数据）
+        /// </summary>
+        /// <param name="source">内存数据</param>
+        /// <returns></returns>
+        ISelect<T1> WithMemory(IEnumerable<T1> source);
 
         /// <summary>
         /// 嵌套查询 select * from ( select ... from table ... ) a

FreeSql/Internal/CommonProvider/SelectProvider/Select1Provider.cs

@@ -437,6 +437,15 @@ namespace FreeSql.Internal.CommonProvider
             if (parms != null) _params.AddRange(_commonUtils.GetDbParamtersByObject(sql, parms));
             return this;
         }
+        public ISelect<T1> WithMemory(IEnumerable<T1> source)
+        {
+            var sb = new StringBuilder();
+            (_orm.InsertOrUpdate<object>().AsType(_tables[0].Table.Type) as InsertOrUpdateProvider<object>)
+                .WriteSourceSelectUnionAll(source.Select(a => (object)a).ToList(), sb, _params);
+
+            try { return WithSql(sb.ToString()); }
+            finally { sb.Clear(); }
+        }
 
         public ISelect<TDto> WithTempQuery<TDto>(Expression<Func<T1, TDto>> selector) => InternalWithTempQuery<TDto>(selector);