sharding page process part

samples/Sample.SqlServer/Shardings/SysUserModPaginationConfiguration.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Sample.SqlServer.Domain.Entities;
+using ShardingCore.Sharding.PaginationConfigurations;
+
+namespace Sample.SqlServer.Shardings
+{
+    public class SysUserModPaginationConfiguration : IPaginationConfiguration<SysUserMod>
+    {
+        public void Configure(PaginationBuilder<SysUserMod> builder)
+        {
+            builder.PaginationSequence(o => o.Id)
+                .UseQueryMatch(PaginationMatchEnum.Owner | PaginationMatchEnum.Named | PaginationMatchEnum.FirstMatch);
+        }
+    }
+}

samples/Sample.SqlServer/Shardings/SysUserModVirtualTableRoute.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Linq.Expressions;
 using Sample.SqlServer.Domain.Entities;
 using ShardingCore.Core.VirtualRoutes;
+using ShardingCore.Sharding.PaginationConfigurations;
 using ShardingCore.VirtualRoutes;
 using ShardingCore.VirtualRoutes.Mods;
 
@@ -25,5 +26,10 @@ namespace Sample.SqlServer.Shardings
         public SysUserModVirtualTableRoute() : base(2,3)
         {
         }
+
+        public override IPaginationConfiguration<SysUserMod> CreatePaginationConfiguration()
+        {
+            return new SysUserModPaginationConfiguration();
+        }
     }
 }

src/ShardingCore/Core/ShardingPage/Abstractions/IShardingPageAccessor.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ShardingCore.Core.ShardingPage.Abstractions
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 13:46:13
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    public interface IShardingPageAccessor
+    {
+        ShardingPageContext ShardingPageContext { get; set; }
+    }
+}

src/ShardingCore/Core/ShardingPage/Abstractions/IShardingPageManager.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ShardingCore.Core.ShardingPage.Abstractions
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 13:46:37
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    public interface IShardingPageManager
+    {
+        ShardingPageContext Current { get; }
+        /// <summary>
+        /// 创建分页scope
+        /// </summary>
+        /// <returns></returns>
+        ShardingPageScope CreateScope();
+    }
+}

src/ShardingCore/Core/ShardingPage/ShardingPageAccessor.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading;
+using ShardingCore.Core.ShardingPage.Abstractions;
+
+namespace ShardingCore.Core.ShardingPage
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 13:47:35
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    public class ShardingPageAccessor:IShardingPageAccessor
+    {
+        private static AsyncLocal<ShardingPageContext> _shardingPageContext = new AsyncLocal<ShardingPageContext>();
+
+
+        /// <inheritdoc />
+        public ShardingPageContext ShardingPageContext
+        {
+            get => _shardingPageContext.Value;
+            set => _shardingPageContext.Value = value;
+        }
+    }
+}

src/ShardingCore/Core/ShardingPage/ShardingPageContext.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using ShardingCore.Sharding.StreamMergeEngines;
+
+namespace ShardingCore.Core.ShardingPage
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 13:46:55
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    public class ShardingPageContext
+    {
+        public  ICollection<RouteQueryResult<long>> RouteQueryResults { get; }
+        private ShardingPageContext()
+        {
+            RouteQueryResults = new LinkedList<RouteQueryResult<long>>();
+        }
+        public static ShardingPageContext Create()
+        {
+            return new ShardingPageContext();
+        }
+    }
+}

src/ShardingCore/Core/ShardingPage/ShardingPageManager.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using ShardingCore.Core.ShardingPage.Abstractions;
+
+namespace ShardingCore.Core.ShardingPage
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 13:50:13
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    public class ShardingPageManager: IShardingPageManager
+    {
+        private readonly IShardingPageAccessor _shardingPageAccessor;
+
+        public ShardingPageManager(IShardingPageAccessor shardingPageAccessor)
+        {
+            _shardingPageAccessor = shardingPageAccessor;
+        }
+
+        public ShardingPageContext Current => _shardingPageAccessor.ShardingPageContext;
+        public ShardingPageScope CreateScope()
+        {
+            var shardingPageScope = new ShardingPageScope(_shardingPageAccessor);
+            _shardingPageAccessor.ShardingPageContext = ShardingPageContext.Create();
+            return shardingPageScope;
+        }
+    }
+}

src/ShardingCore/Core/ShardingPage/ShardingPageScope.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using ShardingCore.Core.ShardingPage.Abstractions;
+
+namespace ShardingCore.Core.ShardingPage
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 13:49:12
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    public class ShardingPageScope : IDisposable
+    {
+
+        /// <summary>
+        /// 分表配置访问器
+        /// </summary>
+        public IShardingPageAccessor ShardingPageAccessor { get; }
+
+        /// <summary>
+        /// 构造函数
+        /// </summary>
+        /// <param name="shardingPageAccessor"></param>
+        public ShardingPageScope(IShardingPageAccessor shardingPageAccessor)
+        {
+            ShardingPageAccessor = shardingPageAccessor;
+        }
+
+        /// <summary>
+        /// 回收
+        /// </summary>
+        public void Dispose()
+        {
+            ShardingPageAccessor.ShardingPageContext = null;
+        }
+    }
+}

src/ShardingCore/Core/VirtualRoutes/TableRoutes/Abstractions/AbstractVirtualTableRoute.cs

@@ -6,6 +6,7 @@ using ShardingCore.Core.QueryRouteManagers;
 using ShardingCore.Core.QueryRouteManagers.Abstractions;
 using ShardingCore.Exceptions;
 using ShardingCore.Extensions;
+using ShardingCore.Sharding.PaginationConfigurations;
 
 namespace ShardingCore.Core.VirtualRoutes.TableRoutes.Abstractions
 {
@@ -17,6 +18,11 @@ namespace ShardingCore.Core.VirtualRoutes.TableRoutes.Abstractions
     */
     public abstract class AbstractVirtualTableRoute<T, TKey> : IVirtualTableRoute<T> where T : class, IShardingTable
     {
+        public virtual IPaginationConfiguration<T> CreatePaginationConfiguration()
+        {
+            return null;
+        }
+
         public Type ShardingEntityType => typeof(T);
         /// <summary>
         /// 如何将分表字段转成对应的类型

src/ShardingCore/Core/VirtualRoutes/TableRoutes/IVirtualTableRoute.cs

@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using ShardingCore.Core.PhysicTables;
+using ShardingCore.Sharding.PaginationConfigurations;
 
 namespace ShardingCore.Core.VirtualRoutes.TableRoutes
 {
@@ -44,5 +45,10 @@ namespace ShardingCore.Core.VirtualRoutes.TableRoutes
 
     public interface IVirtualTableRoute<T> : IVirtualTableRoute where T : class, IShardingTable
     {
+        /// <summary>
+        /// 返回null就是表示不开启分页配置
+        /// </summary>
+        /// <returns></returns>
+        IPaginationConfiguration<T> CreatePaginationConfiguration();
     }
 }

src/ShardingCore/Core/VirtualRoutes/TableRoutes/RoutingRuleEngine/RouteResult.cs

@@ -22,6 +22,23 @@ namespace ShardingCore.Core.VirtualRoutes.TableRoutes.RoutingRuleEngine
         }
         
         public ISet<IPhysicTable> ReplaceTables { get; }
-        
+
+        protected bool Equals(RouteResult other)
+        {
+            return Equals(ReplaceTables, other.ReplaceTables);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj)) return false;
+            if (ReferenceEquals(this, obj)) return true;
+            if (obj.GetType() != this.GetType()) return false;
+            return Equals((RouteResult) obj);
+        }
+
+        public override int GetHashCode()
+        {
+            return (ReplaceTables != null ? ReplaceTables.GetHashCode() : 0);
+        }
     }
 }

src/ShardingCore/Core/VirtualTables/IVirtualTable.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using ShardingCore.Core.PhysicTables;
 using ShardingCore.Core.VirtualRoutes;
 using ShardingCore.Core.VirtualRoutes.TableRoutes;
+using ShardingCore.Sharding.PaginationConfigurations;
 
 namespace ShardingCore.Core.VirtualTables
 {
@@ -22,6 +23,14 @@ namespace ShardingCore.Core.VirtualTables
         /// 分表配置
         /// </summary>
         ShardingTableConfig ShardingConfig { get; }
+        /// <summary>
+        /// 分页配置
+        /// </summary>
+        PaginationMetadata PaginationMetadata { get; }
+        /// <summary>
+        /// 是否启用分页配置
+        /// </summary>
+        bool EnablePagination => PaginationMetadata != null;
 
         /// <summary>
         /// 获取所有的物理表

src/ShardingCore/Core/VirtualTables/OneDbVirtualTable.cs

@@ -8,6 +8,7 @@ using ShardingCore.Core.VirtualRoutes;
 using ShardingCore.Core.VirtualRoutes.TableRoutes;
 using ShardingCore.Exceptions;
 using ShardingCore.Extensions;
+using ShardingCore.Sharding.PaginationConfigurations;
 using ShardingCore.Utils;
 
 namespace ShardingCore.Core.VirtualTables
@@ -28,12 +29,22 @@ namespace ShardingCore.Core.VirtualTables
 
         public Type EntityType => typeof(T);
         public ShardingTableConfig ShardingConfig { get; }
+
+        public PaginationMetadata PaginationMetadata { get; }
+
         private readonly List<IPhysicTable> _physicTables = new List<IPhysicTable>();
 
         public OneDbVirtualTable(IVirtualTableRoute<T> virtualTableRoute)
         {
             _virtualTableRoute = virtualTableRoute;
             ShardingConfig = ShardingKeyUtil.Parse(EntityType);
+            var paginationConfiguration = virtualTableRoute.CreatePaginationConfiguration();
+            if (paginationConfiguration != null)
+            {
+                PaginationMetadata = new PaginationMetadata();
+                var paginationBuilder = new PaginationBuilder<T>(PaginationMetadata);
+                paginationConfiguration.Configure(paginationBuilder);
+            }
         }
 
         public List<IPhysicTable> GetAllPhysicTables()

src/ShardingCore/DIExtension.cs

@@ -16,6 +16,8 @@ using ShardingCore.Core.QueryRouteManagers;
 using ShardingCore.Core.QueryRouteManagers.Abstractions;
 using ShardingCore.Core.ShardingAccessors;
 using ShardingCore.Core.ShardingAccessors.Abstractions;
+using ShardingCore.Core.ShardingPage;
+using ShardingCore.Core.ShardingPage.Abstractions;
 using ShardingCore.Core.VirtualRoutes;
 using ShardingCore.Core.VirtualRoutes.RouteTails.Abstractions;
 using ShardingCore.Sharding.ShardingQueryExecutors;
@@ -87,9 +89,15 @@ namespace ShardingCore
             services.AddSingleton<IShardingAccessor, ShardingAccessor>();
             services.AddSingleton<IShardingScopeFactory, ShardingScopeFactory>();
             services.AddSingleton<IRouteTailFactory, RouteTailFactory>();
+            services.AddSingleton<IShardingQueryExecutor, DefaultShardingQueryExecutor>();
+
+            //route manage
             services.AddSingleton<IShardingRouteManager, ShardingRouteManager>();
             services.AddSingleton<IShardingRouteAccessor, ShardingRouteAccessor>();
-            services.AddSingleton<IShardingQueryExecutor, DefaultShardingQueryExecutor>();
+
+            //sharding page
+            services.AddSingleton<IShardingPageManager, ShardingPageManager>();
+            services.AddSingleton<IShardingPageAccessor, ShardingPageAccessor>();
             return services;
         }
 

src/ShardingCore/Extensions/LinqExtension.cs

@@ -61,6 +61,29 @@ namespace ShardingCore.Extensions
                 func(item);
             }
         }
-        
+
+        /// <summary>
+        /// 是否有差异
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="source"></param>
+        /// <returns></returns>
+        public static bool HasDifference<T>(this IEnumerable<T> source)
+        {
+            return source.Distinct().Count() > 1;
+        }
+        /// <summary>
+        /// 是否有差异
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <typeparam name="TKey"></typeparam>
+        /// <param name="source"></param>
+        /// <param name="keySelector"></param>
+        /// <returns></returns>
+        public static bool HasDifference<T,TKey>(this IEnumerable<T> source, Func<T, TKey> keySelector)
+        {
+            return source.Select(keySelector).Distinct().Count() > 1;
+        }
+
     }
 }

src/ShardingCore/Sharding/PaginationConfigurations/PaginationBuilder.cs

@@ -16,6 +16,12 @@ namespace ShardingCore.Sharding.PaginationConfigurations
     */
     public class PaginationBuilder<TEntity> where TEntity:class,IShardingTable
     {
+        private readonly PaginationMetadata  _metadata;
+
+        public PaginationBuilder(PaginationMetadata metadata)
+        {
+            _metadata = metadata;
+        }
         /// <summary>
         /// 分页顺序
         /// </summary>
@@ -23,7 +29,27 @@ namespace ShardingCore.Sharding.PaginationConfigurations
         /// <typeparam name="TProperty"></typeparam>
         public PaginationOrderPropertyBuilder PaginationSequence<TProperty>(Expression<Func<TEntity, TProperty>> orderPropertyExpression)
         {
-            return new PaginationOrderPropertyBuilder(orderPropertyExpression);
+            return new PaginationOrderPropertyBuilder(orderPropertyExpression, _metadata);
+        }
+        /// <summary>
+        /// 配置当跳过多少条后开始启用只能分页
+        /// </summary>
+        /// <param name="skip"></param>
+        /// <returns></returns>
+        public PaginationBuilder<TEntity> ConfigUseShardingPageIfGeSkip(long skip)
+        {
+            _metadata.UseShardingPageIfGeSkipAvg = skip;
+            return this;
+        }
+        /// <summary>
+        /// 配置当分表数目小于多少后直接取到内存不在流式处理
+        /// </summary>
+        /// <param name="count"></param>
+        /// <returns></returns>
+        public PaginationBuilder<TEntity> ConfigTakeInMemoryCountIfLe(int count)
+        {
+            _metadata.TakeInMemoryCountIfLe = count;
+            return this;
         }
     }
 }

src/ShardingCore/Sharding/PaginationConfigurations/PaginationConfig.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+using System.Reflection;
+using System.Text;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+
+namespace ShardingCore.Sharding.PaginationConfigurations
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 7:45:55
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    public class PaginationConfig
+    {
+        public PaginationConfig(LambdaExpression orderPropertyExpression, PaginationMatchEnum paginationMatchEnum= PaginationMatchEnum.Owner, IComparer<string> tailComparer=null)
+        {
+            OrderPropertyExpression = orderPropertyExpression;
+            OrderPropertyInfo = orderPropertyExpression.GetPropertyAccess();
+            PropertyName = OrderPropertyInfo.Name;
+            PaginationMatchEnum = paginationMatchEnum;
+            TailComparer = tailComparer ?? Comparer<string>.Default;
+        }
+
+        public LambdaExpression OrderPropertyExpression { get; set; }
+        public IComparer<string> TailComparer { get; set; }
+        public PaginationMatchEnum PaginationMatchEnum { get; set; }
+        public PropertyInfo OrderPropertyInfo { get; set; }
+        /// <summary>
+        /// 如果查询没发现排序就将当前配置追加上去
+        /// </summary>
+        public bool AppendIfOrderNone { get; set; }
+        public string PropertyName { get;}
+
+
+        protected bool Equals(PaginationConfig other)
+        {
+            return PropertyName == other.PropertyName;
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj)) return false;
+            if (ReferenceEquals(this, obj)) return true;
+            if (obj.GetType() != this.GetType()) return false;
+            return Equals((PaginationConfig) obj);
+        }
+
+        public override int GetHashCode()
+        {
+            return (PropertyName != null ? PropertyName.GetHashCode() : 0);
+        }
+    }
+}

src/ShardingCore/Sharding/PaginationConfigurations/PaginationMatchEnum.cs

@@ -2,15 +2,26 @@ using System;
 
 namespace ShardingCore.Sharding.PaginationConfigurations
 {
-/*
+    /*
-* @Author: xjm
+    * @Author: xjm
-* @Description:
+    * @Description:
-* @Date: Wednesday, 01 September 2021 21:27:25
+    * @Date: Wednesday, 01 September 2021 21:27:25
-* @Email: 326308290@qq.com
+    * @Email: 326308290@qq.com
-*/
+    */
+    [Flags]
     public enum PaginationMatchEnum
     {
-        Owner=1,
+        /// <summary>
-        Named=1<<1
+        /// 必须是当前对象的属性
+        /// </summary>
+        Owner = 1,
+        /// <summary>
+        /// 只要名称一样就可以了
+        /// </summary>
+        Named = 1 << 1,
+        /// <summary>
+        /// 仅第一个匹配就可以了
+        /// </summary>
+        FirstMatch = 1 << 2
     }
 }

src/ShardingCore/Sharding/PaginationConfigurations/PaginationMetadata.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ShardingCore.Sharding.PaginationConfigurations
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 7:45:16
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    /// <summary>
+    /// 分页配置元数据
+    /// </summary>
+    public class  PaginationMetadata
+    {
+        public ISet<PaginationConfig> PaginationConfigs = new HashSet<PaginationConfig>();
+        /// <summary>
+        /// 配置生效当跳过多少条后  GREATER THAN OR EQUAL
+        /// </summary>
+        public long UseShardingPageIfGeSkipAvg { get; set; } = 3000L;
+        /// <summary>
+        /// 分表发现如果少于多少条后直接取到内存 LESS THAN OR EQUAL
+        /// </summary>
+        public int TakeInMemoryCountIfLe { get; set; } = 100;
+
+    }
+}

src/ShardingCore/Sharding/PaginationConfigurations/PaginationOrderPropertyBuilder.cs

@@ -1,28 +1,23 @@
 using System;
 using System.Collections.Generic;
 using System.Linq.Expressions;
-using System.Reflection;
-using Microsoft.EntityFrameworkCore.Infrastructure;
 
 namespace ShardingCore.Sharding.PaginationConfigurations
 {
-/*
+    /*
-* @Author: xjm
+    * @Author: xjm
-* @Description:
+    * @Description:
-* @Date: Wednesday, 01 September 2021 21:32:53
+    * @Date: Wednesday, 01 September 2021 21:32:53
-* @Email: 326308290@qq.com
+    * @Email: 326308290@qq.com
-*/
+    */
     public class PaginationOrderPropertyBuilder
     {
-        private readonly LambdaExpression _orderPropertyExpression;
+        private readonly PaginationConfig _paginationConfig;
-        private IComparer<string> _tailComparer;
-        private PaginationMatchEnum _paginationMatchEnum;
-        private PropertyInfo _orderPropertyInfo;
 
-        public PaginationOrderPropertyBuilder(LambdaExpression orderPropertyExpression)
+        public PaginationOrderPropertyBuilder(LambdaExpression orderPropertyExpression,PaginationMetadata metadata)
         {
-            _orderPropertyExpression = orderPropertyExpression;
+            _paginationConfig = new PaginationConfig(orderPropertyExpression);
-            _orderPropertyInfo = orderPropertyExpression.GetPropertyAccess();
+            metadata.PaginationConfigs.Add(_paginationConfig);
         }
 
         /// <summary>
@@ -32,7 +27,8 @@ namespace ShardingCore.Sharding.PaginationConfigurations
         /// <returns></returns>
         public PaginationOrderPropertyBuilder UseTailCompare(IComparer<string> tailComparer)
         {
-            _tailComparer = tailComparer ?? throw new ArgumentException(nameof(tailComparer));
+
+            _paginationConfig.TailComparer= tailComparer ?? throw new ArgumentException(nameof(tailComparer));
             return this;
         }
         /// <summary>
@@ -42,7 +38,16 @@ namespace ShardingCore.Sharding.PaginationConfigurations
         /// <returns></returns>
         public PaginationOrderPropertyBuilder UseQueryMatch(PaginationMatchEnum paginationMatchEnum)
         {
-            _paginationMatchEnum = paginationMatchEnum;
+            _paginationConfig.PaginationMatchEnum = paginationMatchEnum;
+            return this;
+        }
+        /// <summary>
+        /// 如果查询没发现排序就将当前配置追加上去
+        /// </summary>
+        /// <returns></returns>
+        public PaginationOrderPropertyBuilder UseAppendIfOrderNone()
+        {
+            _paginationConfig.AppendIfOrderNone = true;
             return this;
         }
     }

src/ShardingCore/Sharding/StreamMergeContext.cs

@@ -104,5 +104,10 @@ namespace ShardingCore.Sharding
             return this.SelectContext.SelectProperties.Any(o => o.IsAggregateMethod);
         }
 
+        public IShardingDbContext GetShardingDbContext()
+        {
+            return _shardingDbContext;
+        }
+
     }
 }

src/ShardingCore/Sharding/StreamMergeEngines/AggregateMergeEngines/AverageAsyncInMemoryMergeEngine.cs

@@ -9,6 +9,7 @@ using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using ShardingCore.Exceptions;
 using ShardingCore.Extensions;
+using ShardingCore.Helpers;
 using ShardingCore.Sharding.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions.AbstractEnsureExpressionMergeEngines;
@@ -32,120 +33,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
 
         public override TEnsureResult MergeResult()
         {
-            if (typeof(decimal) == typeof(TEnsureResult))
+            return AsyncHelper.RunSync(() => MergeResultAsync());
-            {
-                var result = base.Execute(queryable => ((IQueryable<decimal>)queryable).Average());
-                if (result.IsEmpty())
-                    return default;
-                var average = result.Sum() / result.Count;
-                return ConvertSum(average);
-            }
-
-            if (typeof(decimal?) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(
-                     queryable => ((IQueryable<decimal?>)queryable).Average()
-                    );
-                if (result.IsEmpty())
-                    return default;
-                var average = result.Sum().HasValue ? result.Sum() / result.Count : default;
-                return ConvertSum(average);
-            }
-
-            if (typeof(int) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(
-                     queryable => ((IQueryable<int>)queryable).Average()
-                    );
-                if (result.IsEmpty())
-                    return default;
-                var average = result.Sum() / result.Count;
-                return ConvertSum(average);
-            }
-
-            if (typeof(int?) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(
-                     queryable => ((IQueryable<int?>)queryable).Average()
-                    );
-                if (result.IsEmpty())
-                    return default;
-                var average = result.Sum().HasValue ? result.Sum() / result.Count : default;
-                return ConvertSum(average);
-            }
-
-            if (typeof(long) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(
-                     queryable => ((IQueryable<long>)queryable).Average()
-                    );
-                if (result.IsEmpty())
-                    return default;
-                var average = result.Sum() / result.Count;
-                return ConvertSum(average);
-            }
-
-            if (typeof(long?) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(
-                     queryable => ((IQueryable<long?>)queryable).Average()
-                    );
-                if (result.IsEmpty())
-                    return default;
-                var average = result.Sum().HasValue ? result.Sum() / result.Count : default;
-                return ConvertSum(average);
-            }
-
-            if (typeof(double) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(
-                     queryable => ((IQueryable<double>)queryable).Average()
-                    );
-                var average = result.Sum() / result.Count;
-                return ConvertSum(average);
-            }
-
-            if (typeof(double?) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(
-                     queryable => ((IQueryable<double?>)queryable).Average()
-                    );
-                if (result.IsEmpty())
-                    return default;
-                var average = result.Sum().HasValue ? result.Sum() / result.Count : default;
-                return ConvertSum(average);
-            }
-
-            if (typeof(float) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(
-                     queryable => ((IQueryable<float>)queryable).Average()
-                    );
-                if (result.IsEmpty())
-                    return default;
-                var average = result.Sum() / result.Count;
-                return ConvertSum(average);
-            }
-
-            if (typeof(float?) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(
-                     queryable => ((IQueryable<float?>)queryable).Average()
-                    );
-                if (result.IsEmpty())
-                    return default;
-                var average = result.Sum().HasValue ? result.Sum() / result.Count : default;
-                return ConvertSum(average);
-            }
-
-#if !EFCORE2
-            throw new ShardingCoreException(
-                $"not support {GetMethodCallExpression().Print()} result {typeof(TEnsureResult)}");
-#endif
-#if EFCORE2
-            throw new ShardingCoreException(
-                $"not support {GetMethodCallExpression()} result {typeof(TEnsureResult)}");
-#endif
         }
 
         public override async Task<TEnsureResult> MergeResultAsync(
@@ -158,7 +46,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                     cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var average = result.Sum() / result.Count;
+                var average = result.Sum(o=>o.QueryResult) / result.Count;
                 return ConvertSum(average);
             }
 
@@ -169,7 +57,8 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                     cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var average = result.Sum().HasValue ? result.Sum() / result.Count : default;
+                var sum = result.Sum(o => o.QueryResult);
+                var average = sum.HasValue ? sum / result.Count : default;
                 return ConvertSum(average);
             }
 
@@ -180,7 +69,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                     cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var average = result.Sum() / result.Count;
+                var average = result.Sum(o => o.QueryResult) / result.Count;
                 return ConvertSum(average);
             }
 
@@ -191,7 +80,8 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                     cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var average = result.Sum().HasValue ? result.Sum() / result.Count : default;
+                var sum = result.Sum(o => o.QueryResult);
+                var average = sum.HasValue ? sum / result.Count : default;
                 return ConvertSum(average);
             }
 
@@ -202,7 +92,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                     cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var average = result.Sum() / result.Count;
+                var average = result.Sum(o => o.QueryResult) / result.Count;
                 return ConvertSum(average);
             }
 
@@ -213,7 +103,8 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                     cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var average = result.Sum().HasValue ? result.Sum() / result.Count : default;
+                var sum = result.Sum(o => o.QueryResult);
+                var average = sum.HasValue ? sum / result.Count : default;
                 return ConvertSum(average);
             }
 
@@ -222,7 +113,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                 var result = await base.ExecuteAsync(
                     queryable => ((IQueryable<double>)queryable).AverageAsync(cancellationToken),
                     cancellationToken);
-                var average = result.Sum() / result.Count;
+                var average = result.Sum(o => o.QueryResult) / result.Count;
                 return ConvertSum(average);
             }
 
@@ -233,7 +124,8 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                     cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var average = result.Sum().HasValue ? result.Sum() / result.Count : default;
+                var sum = result.Sum(o => o.QueryResult);
+                var average = sum.HasValue ? sum / result.Count : default;
                 return ConvertSum(average);
             }
 
@@ -244,7 +136,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                     cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var average = result.Sum() / result.Count;
+                var average = result.Sum(o => o.QueryResult) / result.Count;
                 return ConvertSum(average);
             }
 
@@ -255,18 +147,13 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                     cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var average = result.Sum().HasValue ? result.Sum() / result.Count : default;
+                var sum = result.Sum(o => o.QueryResult);
+                var average = sum.HasValue ? sum / result.Count : default;
                 return ConvertSum(average);
             }
 
-#if !EFCORE2
             throw new ShardingCoreException(
-                $"not support {GetMethodCallExpression().Print()} result {typeof(TEnsureResult)}");
+                $"not support {GetMethodCallExpression().ShardingPrint()} result {typeof(TEnsureResult)}");
-#endif
-#if EFCORE2
-            throw new ShardingCoreException(
-                $"not support {GetMethodCallExpression()} result {typeof(TEnsureResult)}");
-#endif
         }
 
         private TEnsureResult ConvertSum<TNumber>(TNumber number)

src/ShardingCore/Sharding/StreamMergeEngines/AggregateMergeEngines/MaxAsyncInMemoryMergeEngine.cs

@@ -6,6 +6,7 @@ using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
+using ShardingCore.Helpers;
 using ShardingCore.Sharding.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions.AbstractGenericExpressionMergeEngines;
@@ -27,14 +28,13 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
 
         public override TResult MergeResult<TResult>()
         {
-            var result =  base.Execute( queryable =>  ((IQueryable<TResult>)queryable).Max());
+            return AsyncHelper.RunSync(() => MergeResultAsync<TResult>());
-            return result.Max();
         }
 
         public override async Task<TResult> MergeResultAsync<TResult>(CancellationToken cancellationToken = new CancellationToken())
         {
             var result = await base.ExecuteAsync( queryable =>  ((IQueryable<TResult>)queryable).MaxAsync(cancellationToken), cancellationToken);
-            return result.Max();
+            return result.Max(o=>o.QueryResult);
         }
     }
 }

src/ShardingCore/Sharding/StreamMergeEngines/AggregateMergeEngines/MinAsyncInMemoryMergeEngine.cs

@@ -7,6 +7,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
 using ShardingCore.Extensions;
+using ShardingCore.Helpers;
 using ShardingCore.Sharding.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions.AbstractGenericExpressionMergeEngines;
@@ -28,14 +29,14 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
 
         public override TResult MergeResult<TResult>()
         {
-            var result =  base.Execute( queryable =>  ((IQueryable<TResult>)queryable).Min());
+
-            return result.Min();
+            return AsyncHelper.RunSync(() => MergeResultAsync<TResult>());
         }
 
         public override async Task<TResult> MergeResultAsync<TResult>(CancellationToken cancellationToken = new CancellationToken())
         {
             var result = await base.ExecuteAsync( queryable =>  ((IQueryable<TResult>)queryable).MinAsync(cancellationToken), cancellationToken);
-            return result.Min();
+            return result.Min(o=>o.QueryResult);
         }
     }
 }

src/ShardingCore/Sharding/StreamMergeEngines/AggregateMergeEngines/SumAsyncInMemoryMergeEngine.cs

@@ -9,6 +9,7 @@ using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using ShardingCore.Exceptions;
 using ShardingCore.Extensions;
+using ShardingCore.Helpers;
 using ShardingCore.Sharding.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions.AbstractEnsureExpressionMergeEngines;
@@ -30,94 +31,8 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
 
         public override TEnsureResult MergeResult()
         {
-            if (typeof(decimal) == typeof(TEnsureResult))
+
-            {
+            return AsyncHelper.RunSync(() => MergeResultAsync());
-                var result = base.Execute(queryable => ((IQueryable<decimal>)queryable).Sum());
-                if (result.IsEmpty())
-                    return default;
-                var sum = result.Sum();
-                return ConvertSum(sum);
-            }
-            if (typeof(decimal?) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(queryable => ((IQueryable<decimal?>)queryable).Sum());
-                if (result.IsEmpty())
-                    return default;
-                var sum = result.Sum();
-                return ConvertSum(sum);
-            }
-            if (typeof(int) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(queryable => ((IQueryable<int>)queryable).Sum());
-                if (result.IsEmpty())
-                    return default;
-                var sum = result.Sum();
-                return ConvertSum(sum);
-            }
-            if (typeof(int?) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(queryable => ((IQueryable<int?>)queryable).Sum());
-                if (result.IsEmpty())
-                    return default;
-                var sum = result.Sum();
-                return ConvertSum(sum);
-            }
-            if (typeof(long) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(queryable => ((IQueryable<long>)queryable).Sum());
-                if (result.IsEmpty())
-                    return default;
-                var sum = result.Sum();
-                return ConvertSum(sum);
-            }
-            if (typeof(long?) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(queryable => ((IQueryable<long?>)queryable).Sum());
-                if (result.IsEmpty())
-                    return default;
-                var sum = result.Sum();
-                return ConvertSum(sum);
-            }
-            if (typeof(double) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(queryable => ((IQueryable<double>)queryable).Sum());
-                if (result.IsEmpty())
-                    return default;
-                var sum = result.Sum();
-                return ConvertSum(sum);
-            }
-            if (typeof(double?) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(queryable => ((IQueryable<double?>)queryable).Sum());
-                if (result.IsEmpty())
-                    return default;
-                var sum = result.Sum();
-                return ConvertSum(sum);
-            }
-            if (typeof(float) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(queryable => ((IQueryable<float>)queryable).Sum());
-                if (result.IsEmpty())
-                    return default;
-                var sum = result.Sum();
-                return ConvertSum(sum);
-            }
-            if (typeof(float?) == typeof(TEnsureResult))
-            {
-                var result = base.Execute(queryable => ((IQueryable<float?>)queryable).Sum());
-                if (result.IsEmpty())
-                    return default;
-                var sum = result.Sum();
-                return ConvertSum(sum);
-            }
-#if !EFCORE2
-            throw new ShardingCoreException(
-                $"not support {GetMethodCallExpression().Print()} result {typeof(TEnsureResult)}");
-#endif
-#if EFCORE2
-            throw new ShardingCoreException(
-                $"not support {GetMethodCallExpression()} result {typeof(TEnsureResult)}");
-#endif
         }
 
         public override async Task<TEnsureResult> MergeResultAsync(CancellationToken cancellationToken = new CancellationToken())
@@ -127,7 +42,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                 var result = await base.ExecuteAsync(queryable => ((IQueryable<decimal>)queryable).SumAsync(cancellationToken), cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var sum = result.Sum();
+                var sum = result.Sum(o=>o.QueryResult);
                 return ConvertSum(sum);
             }
             if (typeof(decimal?) == typeof(TEnsureResult))
@@ -135,7 +50,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                 var result = await base.ExecuteAsync(queryable => ((IQueryable<decimal?>)queryable).SumAsync(cancellationToken), cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var sum = result.Sum();
+                var sum = result.Sum(o=>o.QueryResult);
                 return ConvertSum(sum);
             }
             if (typeof(int) == typeof(TEnsureResult))
@@ -143,7 +58,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                 var result = await base.ExecuteAsync(queryable => ((IQueryable<int>)queryable).SumAsync(cancellationToken), cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var sum = result.Sum();
+                var sum = result.Sum(o=>o.QueryResult);
                 return ConvertSum(sum);
             }
             if (typeof(int?) == typeof(TEnsureResult))
@@ -151,7 +66,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                 var result = await base.ExecuteAsync(queryable => ((IQueryable<int?>)queryable).SumAsync(cancellationToken), cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var sum = result.Sum();
+                var sum = result.Sum(o => o.QueryResult);
                 return ConvertSum(sum);
             }
             if (typeof(long) == typeof(TEnsureResult))
@@ -159,7 +74,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                 var result = await base.ExecuteAsync(queryable => ((IQueryable<long>)queryable).SumAsync(cancellationToken), cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var sum = result.Sum();
+                var sum = result.Sum(o => o.QueryResult);
                 return ConvertSum(sum);
             }
             if (typeof(long?) == typeof(TEnsureResult))
@@ -167,7 +82,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                 var result = await base.ExecuteAsync(queryable => ((IQueryable<long?>)queryable).SumAsync(cancellationToken), cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var sum = result.Sum();
+                var sum = result.Sum(o => o.QueryResult);
                 return ConvertSum(sum);
             }
             if (typeof(double) == typeof(TEnsureResult))
@@ -175,7 +90,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                 var result = await base.ExecuteAsync(queryable => ((IQueryable<double>)queryable).SumAsync(cancellationToken), cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var sum = result.Sum();
+                var sum = result.Sum(o => o.QueryResult);
                 return ConvertSum(sum);
             }
             if (typeof(double?) == typeof(TEnsureResult))
@@ -183,7 +98,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                 var result = await base.ExecuteAsync(queryable => ((IQueryable<double?>)queryable).SumAsync(cancellationToken), cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var sum = result.Sum();
+                var sum = result.Sum(o => o.QueryResult);
                 return ConvertSum(sum);
             }
             if (typeof(float) == typeof(TEnsureResult))
@@ -191,7 +106,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                 var result = await base.ExecuteAsync(queryable => ((IQueryable<float>)queryable).SumAsync(cancellationToken), cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var sum = result.Sum();
+                var sum = result.Sum(o => o.QueryResult);
                 return ConvertSum(sum);
             }
             if (typeof(float?) == typeof(TEnsureResult))
@@ -199,18 +114,12 @@ namespace ShardingCore.Sharding.StreamMergeEngines.AggregateMergeEngines
                 var result = await base.ExecuteAsync(queryable => ((IQueryable<float?>)queryable).SumAsync(cancellationToken), cancellationToken);
                 if (result.IsEmpty())
                     return default;
-                var sum = result.Sum();
+                var sum = result.Sum(o => o.QueryResult);
                 return ConvertSum(sum);
             }
 
-#if !EFCORE2
             throw new ShardingCoreException(
-                $"not support {GetMethodCallExpression().Print()} result {typeof(TEnsureResult)}");
+                $"not support {GetMethodCallExpression().ShardingPrint()} result {typeof(TEnsureResult)}");
-#endif
-#if EFCORE2
-            throw new ShardingCoreException(
-                $"not support {GetMethodCallExpression()} result {typeof(TEnsureResult)}");
-#endif
         }
         private TEnsureResult ConvertSum<TNumber>(TNumber number)
         {

src/ShardingCore/Sharding/StreamMergeEngines/AllAsyncInMemoryMergeEngine.cs

@@ -38,7 +38,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines
 
             var result = await base.ExecuteAsync( queryable =>  ((IQueryable<TEntity>)queryable).AnyAsync(cancellationToken), cancellationToken);
 
-            return result.All(o => o);
+            return result.All(o => o.QueryResult);
         }
     }
 }

src/ShardingCore/Sharding/StreamMergeEngines/AnyAsyncInMemoryMergeEngine.cs

@@ -7,6 +7,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
+using ShardingCore.Helpers;
 using ShardingCore.Sharding.Abstractions;
 using ShardingCore.Sharding.Enumerators;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions;
@@ -29,16 +30,14 @@ namespace ShardingCore.Sharding.StreamMergeEngines
 
         public override bool MergeResult()
         {
-            var result =  base.Execute( queryable =>  ((IQueryable<TEntity>)queryable).Any());
+            return AsyncHelper.RunSync(() => MergeResultAsync());
-
-            return result.Any(o => o);
         }
 
         public override async Task<bool> MergeResultAsync(CancellationToken cancellationToken = new CancellationToken())
         {
             var result = await base.ExecuteAsync( queryable =>  ((IQueryable<TEntity>)queryable).AnyAsync(cancellationToken), cancellationToken);
 
-            return result.Any(o => o);
+            return result.Any(o => o.QueryResult);
         }
 
     }

src/ShardingCore/Sharding/StreamMergeEngines/AsyncEnumerableStreamMergeEngine.cs

@@ -75,7 +75,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines
 
         private IAsyncEnumerator<T> GetShardingEnumerator()
         {
-            var tableResult = _mergeContext.GetRouteResults();
+            var tableResult = _mergeContext.RouteResults;
             var routeCount = tableResult.Count();
             var enumeratorTasks = tableResult.Select(routeResult =>
             {
@@ -114,7 +114,7 @@ namespace ShardingCore.Sharding.StreamMergeEngines
 
         public IEnumerator<T> GetEnumerator()
         {
-            var tableResult = _mergeContext.GetRouteResults();
+            var tableResult = _mergeContext.RouteResults;
             var routeCount = tableResult.Count();
             var enumeratorTasks = tableResult.Select(routeResult =>
             {

src/ShardingCore/Sharding/StreamMergeEngines/ContainsAsyncInMemoryMergeEngine.cs

@@ -4,6 +4,7 @@ using System.Linq.Expressions;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
+using ShardingCore.Helpers;
 using ShardingCore.Sharding.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions.AbstractEnsureExpressionMergeEngines;
@@ -25,16 +26,14 @@ namespace ShardingCore.Sharding.StreamMergeEngines
 
         public override bool MergeResult()
         {
-            var result =  base.Execute( queryable =>  ((IQueryable<TEntity>)queryable).Contains(GetConstantItem()));
+            return AsyncHelper.RunSync(() => MergeResultAsync());
-
-            return result.Any(o => o);
         }
 
         public override async Task<bool> MergeResultAsync(CancellationToken cancellationToken = new CancellationToken())
         {
             var result = await base.ExecuteAsync( queryable =>  ((IQueryable<TEntity>)queryable).ContainsAsync(GetConstantItem(), cancellationToken), cancellationToken);
 
-            return result.Any(o => o);
+            return result.Any(o => o.QueryResult);
         }
 
     }

src/ShardingCore/Sharding/StreamMergeEngines/CountAsyncInMemoryMergeEngine.cs

@@ -4,6 +4,7 @@ using System.Linq;
 using System.Linq.Expressions;
 using System.Threading;
 using System.Threading.Tasks;
+using ShardingCore.Core.ShardingPage.Abstractions;
 using ShardingCore.Helpers;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions.AbstractEnsureExpressionMergeEngines;
 
@@ -18,8 +19,10 @@ namespace ShardingCore.Sharding.StreamMergeEngines
     */
     public class CountAsyncInMemoryMergeEngine<TEntity> : AbstractEnsureMethodCallWhereInMemoryAsyncMergeEngine<TEntity,int>
     {
+        private readonly IShardingPageManager _shardingPageManager;
         public CountAsyncInMemoryMergeEngine(MethodCallExpression methodCallExpression, IShardingDbContext shardingDbContext) : base(methodCallExpression, shardingDbContext)
         {
+            _shardingPageManager = ShardingContainer.GetService<IShardingPageManager>();
         }
 
         public override int MergeResult()
@@ -31,6 +34,13 @@ namespace ShardingCore.Sharding.StreamMergeEngines
         {
             var result = await base.ExecuteAsync( queryable =>  ((IQueryable<TEntity>)queryable).CountAsync(cancellationToken), cancellationToken);
 
+            if (_shardingPageManager.Current != null)
+            {
+                foreach (var routeQueryResult in result)
+                {
+                    _shardingPageManager.Current.RouteQueryResults.Add(new RouteQueryResult<long>(routeQueryResult.RouteResult, routeQueryResult.QueryResult));
+                }
+            }
             return result.Sum(o=>o.QueryResult);
         }
 

src/ShardingCore/Sharding/StreamMergeEngines/EnumeratorStreamMergeEngines/Abstractions/AbstractEnumeratorAsyncStreamMergeEngine.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+using ShardingCore.Core.VirtualRoutes.TableRoutes.RoutingRuleEngine;
+using ShardingCore.Exceptions;
+using ShardingCore.Extensions;
+using ShardingCore.Sharding.Enumerators;
+using ShardingCore.Sharding.Enumerators.StreamMergeAsync;
+
+namespace ShardingCore.Sharding.StreamMergeEngines.EnumeratorStreamMergeEngines.Abstractions
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 15:38:05
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    public abstract class AbstractEnumeratorAsyncStreamMergeEngine<TEntity>: AbstractEnumeratorStreamMergeEngine<TEntity>
+    {
+        public AbstractEnumeratorAsyncStreamMergeEngine(StreamMergeContext<TEntity> streamMergeContext) : base(streamMergeContext)
+        {
+        }
+
+        public override IAsyncEnumerator<TEntity> GetAsyncEnumerator(CancellationToken cancellationToken = new CancellationToken())
+        {
+            var dbStreamMergeAsyncEnumerators = GetDbStreamMergeAsyncEnumerators();
+            if (dbStreamMergeAsyncEnumerators.IsEmpty())
+                throw new ShardingCoreException("GetDbStreamMergeAsyncEnumerators empty");
+            return GetStreamMergeAsyncEnumerator(dbStreamMergeAsyncEnumerators);
+        }
+
+        public abstract IStreamMergeAsyncEnumerator<TEntity>[] GetDbStreamMergeAsyncEnumerators();
+        public abstract IStreamMergeAsyncEnumerator<TEntity> GetStreamMergeAsyncEnumerator(IStreamMergeAsyncEnumerator<TEntity>[] streamsAsyncEnumerators);
+        public async Task<IAsyncEnumerator<TEntity>> DoGetAsyncEnumerator(IQueryable<TEntity> newQueryable)
+        {
+            var enumator = newQueryable.AsAsyncEnumerable().GetAsyncEnumerator();
+            await enumator.MoveNextAsync();
+            return enumator;
+        }
+        public virtual IQueryable<TEntity> CreateAsyncExecuteQueryable(RouteResult routeResult, int routeCount)
+        {
+            var shardingDbContext = StreamMergeContext.CreateDbContext(routeResult);
+            var useOriginal = routeCount > 1;
+            DbContextQueryStore.TryAdd(routeResult,shardingDbContext);
+            var newQueryable = (IQueryable<TEntity>)(useOriginal ? StreamMergeContext.GetReWriteQueryable() : StreamMergeContext.GetOriginalQueryable())
+                .ReplaceDbContextQueryable(shardingDbContext);
+            return newQueryable;
+        }
+
+        public override IEnumerator<TEntity> GetEnumerator()
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

src/ShardingCore/Sharding/StreamMergeEngines/EnumeratorStreamMergeEngines/Abstractions/AbstractEnumeratorStreamMergeEngine.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading;
+using Microsoft.EntityFrameworkCore;
+using ShardingCore.Core.VirtualRoutes.TableRoutes.RoutingRuleEngine;
+using ShardingCore.Extensions;
+
+namespace ShardingCore.Sharding.StreamMergeEngines.EnumeratorStreamMergeEngines.Abstractions
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 15:35:39
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    public abstract class AbstractEnumeratorStreamMergeEngine<TEntity>:IEnumeratorStreamMergeEngine<TEntity>
+    {
+        public StreamMergeContext<TEntity> StreamMergeContext { get; }
+        public ConcurrentDictionary<RouteResult,DbContext> DbContextQueryStore { get; }
+
+        public AbstractEnumeratorStreamMergeEngine(StreamMergeContext<TEntity> streamMergeContext)
+        {
+            StreamMergeContext = streamMergeContext;
+            DbContextQueryStore = new ConcurrentDictionary<RouteResult, DbContext>();
+        }
+
+        public abstract IAsyncEnumerator<TEntity> GetAsyncEnumerator(
+            CancellationToken cancellationToken = new CancellationToken());
+
+        public abstract IEnumerator<TEntity> GetEnumerator();
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+
+        public void Dispose()
+        {
+            if (DbContextQueryStore.IsNotEmpty())
+            {
+                DbContextQueryStore.Values.ForEach(dbContext =>
+                {
+                    dbContext.Dispose();
+                });
+            }
+        }
+    }
+}

src/ShardingCore/Sharding/StreamMergeEngines/EnumeratorStreamMergeEngines/Abstractions/AbstractEnumeratorSyncStreamMergeEngine.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading;
+
+namespace ShardingCore.Sharding.StreamMergeEngines.EnumeratorStreamMergeEngines.Abstractions
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 15:38:13
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    public class AbstractEnumeratorSyncStreamMergeEngine<TEntity> : AbstractEnumeratorStreamMergeEngine<TEntity>
+    {
+        public AbstractEnumeratorSyncStreamMergeEngine(StreamMergeContext<TEntity> streamMergeContext) : base(streamMergeContext)
+        {
+        }
+
+        public override IAsyncEnumerator<TEntity> GetAsyncEnumerator(CancellationToken cancellationToken = new CancellationToken())
+        {
+            throw new NotImplementedException();
+        }
+
+        public override IEnumerator<TEntity> GetEnumerator()
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

src/ShardingCore/Sharding/StreamMergeEngines/EnumeratorStreamMergeEngines/Abstractions/IEnumeratorStreamMergeEngine.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+
+namespace ShardingCore.Sharding.StreamMergeEngines.EnumeratorStreamMergeEngines.Abstractions
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 15:15:34
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    public interface IEnumeratorStreamMergeEngine<TEntity> : IAsyncEnumerable<TEntity>, IEnumerable<TEntity>, IDisposable
+    {
+    }
+}

src/ShardingCore/Sharding/StreamMergeEngines/EnumeratorStreamMergeEngines/NormalEnumeratorAsyncStreamMergeEngine.cs

@@ -0,0 +1,74 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ShardingCore.Core.VirtualRoutes.TableRoutes.RoutingRuleEngine;
+using ShardingCore.Extensions;
+using ShardingCore.Sharding.Enumerators;
+using ShardingCore.Sharding.Enumerators.StreamMergeAsync;
+using ShardingCore.Sharding.StreamMergeEngines.EnumeratorStreamMergeEngines.Abstractions;
+
+namespace ShardingCore.Sharding.StreamMergeEngines.EnumeratorStreamMergeEngines
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 16:16:12
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    public class NormalEnumeratorAsyncStreamMergeEngine<TEntity>:AbstractEnumeratorAsyncStreamMergeEngine<TEntity>
+    {
+        private readonly bool _multiRouteQuery;
+        public NormalEnumeratorAsyncStreamMergeEngine(StreamMergeContext<TEntity> streamMergeContext) : base(streamMergeContext)
+        {
+            _multiRouteQuery = streamMergeContext.RouteResults.Count() > 1;
+        }
+
+        public override IStreamMergeAsyncEnumerator<TEntity>[] GetDbStreamMergeAsyncEnumerators()
+        {
+            var tableResult = StreamMergeContext.RouteResults;
+            var routeCount = tableResult.Count();
+            var enumeratorTasks = tableResult.Select(routeResult =>
+            {
+                return Task.Run(async () =>
+                {
+                    try
+                    {
+                        var newQueryable = CreateAsyncExecuteQueryable(routeResult, routeCount);
+
+                        var asyncEnumerator = await DoGetAsyncEnumerator(newQueryable);
+                        return new StreamMergeAsyncEnumerator<TEntity>(asyncEnumerator);
+                    }
+                    catch (Exception e)
+                    {
+                        Console.WriteLine(e);
+                        throw;
+                    }
+                });
+            }).ToArray();
+
+            var streamEnumerators = Task.WhenAll(enumeratorTasks).GetAwaiter().GetResult();
+            return streamEnumerators;
+        }
+
+        public override IQueryable<TEntity> CreateAsyncExecuteQueryable(RouteResult routeResult, int routeCount)
+        {
+            var shardingDbContext = StreamMergeContext.CreateDbContext(routeResult);
+            DbContextQueryStore.TryAdd(routeResult, shardingDbContext);
+            var newQueryable = (IQueryable<TEntity>)(_multiRouteQuery ? StreamMergeContext.GetReWriteQueryable() : StreamMergeContext.GetOriginalQueryable())
+                .ReplaceDbContextQueryable(shardingDbContext);
+            return newQueryable;
+        }
+
+        public override IStreamMergeAsyncEnumerator<TEntity> GetStreamMergeAsyncEnumerator(IStreamMergeAsyncEnumerator<TEntity>[] streamsAsyncEnumerators)
+        {
+            if (_multiRouteQuery && StreamMergeContext.HasSkipTake())
+                return new PaginationStreamMergeAsyncEnumerator<TEntity>(StreamMergeContext, streamsAsyncEnumerators);
+            if (StreamMergeContext.HasGroupQuery())
+                return new MultiAggregateOrderStreamMergeAsyncEnumerator<TEntity>(StreamMergeContext, streamsAsyncEnumerators);
+            return new MultiOrderStreamMergeAsyncEnumerator<TEntity>(StreamMergeContext, streamsAsyncEnumerators);
+        }
+    }
+}

src/ShardingCore/Sharding/StreamMergeEngines/EnumeratorStreamMergeEngines/SequenceEnumeratorAsyncStreamMergeEngine.cs

@@ -0,0 +1,100 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ShardingCore.Core.ShardingPage.Abstractions;
+using ShardingCore.Core.VirtualRoutes.TableRoutes.RoutingRuleEngine;
+using ShardingCore.Core.VirtualTables;
+using ShardingCore.Exceptions;
+using ShardingCore.Extensions;
+using ShardingCore.Sharding.Enumerators;
+using ShardingCore.Sharding.Enumerators.StreamMergeAsync;
+using ShardingCore.Sharding.StreamMergeEngines.EnumeratorStreamMergeEngines.Abstractions;
+
+namespace ShardingCore.Sharding.StreamMergeEngines.EnumeratorStreamMergeEngines
+{
+    /*
+    * @Author: xjm
+    * @Description:
+    * @Date: 2021/9/2 16:29:06
+    * @Ver: 1.0
+    * @Email: 326308290@qq.com
+    */
+    public class SequenceEnumeratorAsyncStreamMergeEngine<TEntity> : AbstractEnumeratorAsyncStreamMergeEngine<TEntity>
+    {
+        private IShardingPageManager _shardingPageManager;
+        private IVirtualTableManager _virtualTableManager;
+        public SequenceEnumeratorAsyncStreamMergeEngine(StreamMergeContext<TEntity> streamMergeContext) : base(streamMergeContext)
+        {
+            _shardingPageManager = ShardingContainer.GetService<IShardingPageManager>();
+            _virtualTableManager = ShardingContainer.GetService<IVirtualTableManager>();
+        }
+
+        public override IStreamMergeAsyncEnumerator<TEntity>[] GetDbStreamMergeAsyncEnumerators()
+        {
+            var routeQueryResults = _shardingPageManager.Current.RouteQueryResults.ToList();
+            if (routeQueryResults.Any(o => o.RouteResult.ReplaceTables.Count(p=>p.IsShardingTable())!=1)
+                || routeQueryResults.HasDifference(o=>o.RouteResult.ReplaceTables.First().EntityType))
+                throw new InvalidOperationException($"error sharding page:[{StreamMergeContext.GetOriginalQueryable().Expression.ShardingPrint()}]");
+            var shardingEntityType = routeQueryResults[0].RouteResult.ReplaceTables.FirstOrDefault(o=>o.IsShardingTable()).EntityType;
+            var virtualTable = _virtualTableManager.GetVirtualTable(StreamMergeContext.GetShardingDbContext().ShardingDbContextType, shardingEntityType);
+            if (!virtualTable.EnablePagination)
+            {
+                throw new ShardingCoreException("not support Sequence enumerator");
+            }
+
+            if (base.StreamMergeContext.Orders.IsEmpty())
+            {
+                var append = virtualTable.PaginationMetadata.PaginationConfigs.FirstOrDefault(o=>o.AppendIfOrderNone);
+                if (append != null)
+                {
+                    StreamMergeContext.GetOriginalQueryable().OrderBy("")
+                }
+            }
+
+
+            var tableResult = StreamMergeContext.RouteResults;
+            var routeCount = tableResult.Count();
+            var enumeratorTasks = tableResult.Select(routeResult =>
+            {
+                return Task.Run(async () =>
+                {
+                    try
+                    {
+                        var newQueryable = CreateAsyncExecuteQueryable(routeResult, routeCount);
+
+                        var asyncEnumerator = await DoGetAsyncEnumerator(newQueryable);
+                        return new StreamMergeAsyncEnumerator<TEntity>(asyncEnumerator);
+                    }
+                    catch (Exception e)
+                    {
+                        Console.WriteLine(e);
+                        throw;
+                    }
+                });
+            }).ToArray();
+
+            var streamEnumerators = Task.WhenAll(enumeratorTasks).GetAwaiter().GetResult();
+            return streamEnumerators;
+        }
+
+        public override IQueryable<TEntity> CreateAsyncExecuteQueryable(RouteResult routeResult, int routeCount)
+        {
+            var shardingDbContext = StreamMergeContext.CreateDbContext(routeResult);
+            DbContextQueryStore.TryAdd(routeResult, shardingDbContext);
+            var newQueryable = (IQueryable<TEntity>)(_multiRouteQuery ? StreamMergeContext.GetReWriteQueryable() : StreamMergeContext.GetOriginalQueryable())
+                .ReplaceDbContextQueryable(shardingDbContext);
+            return newQueryable;
+        }
+
+        public override IStreamMergeAsyncEnumerator<TEntity> GetStreamMergeAsyncEnumerator(IStreamMergeAsyncEnumerator<TEntity>[] streamsAsyncEnumerators)
+        {
+            if (_multiRouteQuery && StreamMergeContext.HasSkipTake())
+                return new PaginationStreamMergeAsyncEnumerator<TEntity>(StreamMergeContext, streamsAsyncEnumerators);
+            if (StreamMergeContext.HasGroupQuery())
+                return new MultiAggregateOrderStreamMergeAsyncEnumerator<TEntity>(StreamMergeContext, streamsAsyncEnumerators);
+            return new MultiOrderStreamMergeAsyncEnumerator<TEntity>(StreamMergeContext, streamsAsyncEnumerators);
+        }
+    }
+}

src/ShardingCore/Sharding/StreamMergeEngines/FirstAsyncInMemoryMergeEngine.cs

@@ -7,6 +7,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
 using ShardingCore.Extensions;
+using ShardingCore.Helpers;
 using ShardingCore.Sharding.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions.AbstractGenericExpressionMergeEngines;
@@ -28,20 +29,13 @@ namespace ShardingCore.Sharding.StreamMergeEngines
 
         public override TResult MergeResult<TResult>()
         {
-            var result =  base.Execute(queryable =>  ((IQueryable<TResult>)queryable).First());
+            return AsyncHelper.RunSync(() => MergeResultAsync<TResult>());
-            var q = result.Where(o => o != null).AsQueryable();
-
-            var streamMergeContext = GetStreamMergeContext();
-            if (streamMergeContext.Orders.Any())
-                return q.OrderWithExpression(streamMergeContext.Orders).First();
-
-            return q.First();
         }
 
         public override async Task<TResult> MergeResultAsync<TResult>(CancellationToken cancellationToken = new CancellationToken())
         {
             var result = await base.ExecuteAsync( queryable =>  ((IQueryable<TResult>)queryable).FirstAsync(cancellationToken), cancellationToken);
-            var q = result.Where(o => o != null).AsQueryable();
+            var q = result.Where(o => o != null&&o.QueryResult!=null).Select(o=>o.QueryResult).AsQueryable();
 
             var streamMergeContext = GetStreamMergeContext();
             if (streamMergeContext.Orders.Any())

src/ShardingCore/Sharding/StreamMergeEngines/FirstOrDefaultAsyncInMemoryMergeEngine.cs

@@ -9,6 +9,7 @@ using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using ShardingCore.Exceptions;
 using ShardingCore.Extensions;
+using ShardingCore.Helpers;
 using ShardingCore.Sharding.Abstractions;
 using ShardingCore.Sharding.Enumerators;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions;
@@ -31,20 +32,13 @@ namespace ShardingCore.Sharding.StreamMergeEngines
 
         public override TResult MergeResult<TResult>()
         {
-            var result =  base.Execute( queryable =>  ((IQueryable<TResult>)queryable).FirstOrDefault());
+            return AsyncHelper.RunSync(() => MergeResultAsync<TResult>());
-            var q = result.Where(o => o != null).AsQueryable();
-
-            var streamMergeContext = GetStreamMergeContext();
-            if (streamMergeContext.Orders.Any())
-                return q.OrderWithExpression(streamMergeContext.Orders).FirstOrDefault();
-
-            return q.FirstOrDefault();
         }
 
         public override async Task<TResult> MergeResultAsync<TResult>(CancellationToken cancellationToken = new CancellationToken())
         {
             var result = await base.ExecuteAsync( queryable =>  ((IQueryable<TResult>)queryable).FirstOrDefaultAsync(cancellationToken), cancellationToken);
-            var q = result.Where(o => o != null).AsQueryable();
+            var q = result.Where(o => o != null&&o.QueryResult!=null).Select(o=>o.QueryResult).AsQueryable();
 
             var streamMergeContext = GetStreamMergeContext();
             if (streamMergeContext.Orders.Any())

src/ShardingCore/Sharding/StreamMergeEngines/LastAsyncInMemoryMergeEngine.cs

@@ -7,6 +7,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
 using ShardingCore.Extensions;
+using ShardingCore.Helpers;
 using ShardingCore.Sharding.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions.AbstractGenericExpressionMergeEngines;
@@ -28,21 +29,14 @@ namespace ShardingCore.Sharding.StreamMergeEngines
 
         public override TResult MergeResult<TResult>()
         {
-            var result =  base.Execute( queryable =>  ((IQueryable<TResult>)queryable).Last());
+            return AsyncHelper.RunSync(() => MergeResultAsync<TResult>());
-            var q = result.Where(o => o != null).AsQueryable();
-
-            var streamMergeContext = GetStreamMergeContext();
-            if (streamMergeContext.Orders.Any())
-                return q.OrderWithExpression(streamMergeContext.Orders).Last();
-
-            return q.Last();
         }
 
         public override async Task<TResult> MergeResultAsync<TResult>(CancellationToken cancellationToken = new CancellationToken())
         {
 
             var result = await base.ExecuteAsync( queryable =>  ((IQueryable<TResult>)queryable).LastAsync(cancellationToken), cancellationToken);
-            var q = result.Where(o => o != null).AsQueryable();
+            var q = result.Where(o => o != null&&o.QueryResult!=null).Select(o=>o.QueryResult).AsQueryable();
 
             var streamMergeContext = GetStreamMergeContext();
             if (streamMergeContext.Orders.Any())

src/ShardingCore/Sharding/StreamMergeEngines/LastOrDefaultAsyncInMemoryMergeEngine.cs

@@ -7,6 +7,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
 using ShardingCore.Extensions;
+using ShardingCore.Helpers;
 using ShardingCore.Sharding.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions.AbstractGenericExpressionMergeEngines;
@@ -28,20 +29,13 @@ namespace ShardingCore.Sharding.StreamMergeEngines
 
         public override TResult MergeResult<TResult>()
         {
-            var result =  base.Execute( queryable =>  ((IQueryable<TResult>)queryable).LastOrDefault());
+            return AsyncHelper.RunSync(() => MergeResultAsync<TResult>());
-            var q = result.Where(o => o != null).AsQueryable();
-
-            var streamMergeContext = GetStreamMergeContext();
-            if (streamMergeContext.Orders.Any())
-                return q.OrderWithExpression(streamMergeContext.Orders).LastOrDefault();
-
-            return q.LastOrDefault();
         }
 
         public override async Task<TResult> MergeResultAsync<TResult>(CancellationToken cancellationToken = new CancellationToken())
         {
             var result = await base.ExecuteAsync( queryable =>  ((IQueryable<TResult>)queryable).LastOrDefaultAsync(cancellationToken), cancellationToken);
-            var q = result.Where(o => o != null).AsQueryable();
+            var q = result.Where(o => o != null&&o.QueryResult!=null).Select(o=>o.QueryResult).AsQueryable();
 
             var streamMergeContext = GetStreamMergeContext();
             if (streamMergeContext.Orders.Any())

src/ShardingCore/Sharding/StreamMergeEngines/LongCountAsyncInMemoryMergeEngine.cs

@@ -7,6 +7,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
+using ShardingCore.Core.ShardingPage.Abstractions;
 using ShardingCore.Exceptions;
 using ShardingCore.Helpers;
 using ShardingCore.Sharding.Abstractions;
@@ -25,8 +26,10 @@ namespace ShardingCore.Sharding.StreamMergeEngines
     */
     public class LongCountAsyncInMemoryMergeEngine<TEntity> : AbstractEnsureMethodCallWhereInMemoryAsyncMergeEngine<TEntity,long>
     {
+        private readonly IShardingPageManager _shardingPageManager;
         public LongCountAsyncInMemoryMergeEngine(MethodCallExpression methodCallExpression, IShardingDbContext shardingDbContext) : base(methodCallExpression, shardingDbContext)
         {
+            _shardingPageManager= ShardingContainer.GetService<IShardingPageManager>();
         }
 
         public override long MergeResult()
@@ -39,6 +42,14 @@ namespace ShardingCore.Sharding.StreamMergeEngines
 
             var result = await base.ExecuteAsync( queryable =>  ((IQueryable<TEntity>)queryable).LongCountAsync(cancellationToken), cancellationToken);
 
+            if (_shardingPageManager.Current != null)
+            {
+                foreach (var routeQueryResult in result)
+                {
+                    _shardingPageManager.Current.RouteQueryResults.Add(routeQueryResult);
+                }
+            }
+
             return result.Sum(o=>o.QueryResult);
         }
     }

src/ShardingCore/Sharding/StreamMergeEngines/SingleAsyncInMemoryMergeEngine.cs

@@ -7,6 +7,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
 using ShardingCore.Extensions;
+using ShardingCore.Helpers;
 using ShardingCore.Sharding.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions.AbstractGenericExpressionMergeEngines;
@@ -28,20 +29,13 @@ namespace ShardingCore.Sharding.StreamMergeEngines
 
         public override TResult MergeResult<TResult>()
         {
-            var result =  base.Execute( queryable =>  ((IQueryable<TResult>)queryable).Single());
+            return AsyncHelper.RunSync(() => MergeResultAsync<TResult>());
-            var q = result.Where(o => o != null).AsQueryable();
-
-            var streamMergeContext = GetStreamMergeContext();
-            if (streamMergeContext.Orders.Any())
-                return q.OrderWithExpression(streamMergeContext.Orders).Single();
-
-            return q.Single();
         }
 
         public override async Task<TResult> MergeResultAsync<TResult>(CancellationToken cancellationToken = new CancellationToken())
         {
             var result = await base.ExecuteAsync( queryable =>  ((IQueryable<TResult>)queryable).SingleAsync(cancellationToken), cancellationToken);
-            var q = result.Where(o => o != null).AsQueryable();
+            var q = result.Where(o => o != null&&o.QueryResult!=null).Select(o=>o.QueryResult).AsQueryable();
 
             var streamMergeContext = GetStreamMergeContext();
             if (streamMergeContext.Orders.Any())

src/ShardingCore/Sharding/StreamMergeEngines/SingleOrDefaultAsyncInMemoryMergeEngine.cs

@@ -7,6 +7,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore;
 using ShardingCore.Extensions;
+using ShardingCore.Helpers;
 using ShardingCore.Sharding.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions;
 using ShardingCore.Sharding.StreamMergeEngines.Abstractions.AbstractGenericExpressionMergeEngines;
@@ -28,20 +29,14 @@ namespace ShardingCore.Sharding.StreamMergeEngines
 
         public override TResult MergeResult<TResult>()
         {
-            var result =  base.Execute(queryable => ((IQueryable<TResult>)queryable).SingleOrDefault());
-            var q = result.Where(o => o != null).AsQueryable();
 
-            var streamMergeContext = GetStreamMergeContext();
+            return AsyncHelper.RunSync(() => MergeResultAsync<TResult>());
-            if (streamMergeContext.Orders.Any())
-                return q.OrderWithExpression(streamMergeContext.Orders).SingleOrDefault();
-
-            return q.SingleOrDefault();
         }
 
         public override async Task<TResult> MergeResultAsync<TResult>(CancellationToken cancellationToken = new CancellationToken())
         {
             var result = await base.ExecuteAsync( queryable =>  ((IQueryable<TResult>)queryable).SingleOrDefaultAsync(cancellationToken), cancellationToken);
-            var q = result.Where(o => o != null).AsQueryable();
+            var q = result.Where(o => o != null&&o.QueryResult!=null).Select(o=>o.QueryResult).AsQueryable();
 
             var streamMergeContext = GetStreamMergeContext();
             if (streamMergeContext.Orders.Any())