Update split table

Src/Asp.NetCore2/SqlSugar/Abstract/DeleteProvider/DeleteableProvider.cs

@@ -22,6 +22,7 @@ namespace SqlSugar
         public DiffLogModel diffModel { get; set; }
         public List<string> tempPrimaryKeys { get; set; }
         internal Action RemoveCacheFunc { get; set; }
+        internal List<T> DeleteObjects { get; set; }
         public EntityInfo EntityInfo
         {
             get
@@ -87,6 +88,7 @@ namespace SqlSugar
 
         public IDeleteable<T> Where(List<T> deleteObjs)
         {
+            this.DeleteObjects = deleteObjs;
             if (deleteObjs == null || deleteObjs.Count() == 0)
             {
                 Where(SqlBuilder.SqlFalse);
@@ -292,6 +294,19 @@ namespace SqlSugar
             result.deleteobj = this;
             return result;
         }
+        public SplitTableDeleteByObjectProvider<T> SplitTable()
+        {
+            SplitTableDeleteByObjectProvider<T> result = new SplitTableDeleteByObjectProvider<T>();
+            result.Context = this.Context;
+            Check.ExceptionEasy(this.DeleteObjects == null, "SplitTable() +0  only List<T> can be deleted", "SplitTable()无参数重载只支持根据实体集合删除");
+            result.deleteObjects = this.DeleteObjects.ToArray();
+            SplitTableContext helper = new SplitTableContext((SqlSugarProvider)Context)
+            {
+                EntityInfo = this.EntityInfo
+            };
+            result.deleteobj = this;
+            return result;
+        }
         public LogicDeleteProvider<T> IsLogic() 
         {
             LogicDeleteProvider<T> result = new LogicDeleteProvider<T>();

Src/Asp.NetCore2/SqlSugar/Abstract/DeleteProvider/SplitTableDeleteByObjectProvider.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+
+namespace SqlSugar 
+{
+    public class SplitTableDeleteByObjectProvider<T>  where T : class, new()
+    {
+        public ISqlSugarClient Context;
+        public DeleteableProvider<T> deleteobj;
+        public T [] deleteObjects { get; set; }
+
+        public int ExecuteCommand()
+        {
+            List<GroupModel> groupModels;
+            int result;
+            GroupDataList(deleteObjects, out groupModels, out result);
+            foreach (var item in groupModels.GroupBy(it => it.GroupName))
+            {
+                var addList = item.Select(it => it.Item).ToList();
+                result += this.Context.Deleteable<T>().Where(addList).AS(item.Key).ExecuteCommand();
+            }
+            return result;
+        }
+        public async Task<int> ExecuteCommandAsync()
+        {
+            List<GroupModel> groupModels;
+            int result;
+            GroupDataList(deleteObjects, out groupModels, out result);
+            foreach (var item in groupModels.GroupBy(it => it.GroupName))
+            {
+                var addList = item.Select(it => it.Item).ToList();
+                result +=await this.Context.Deleteable<T>().Where(addList).AS(item.Key).ExecuteCommandAsync();
+            }
+            return result;
+        }
+
+        private void GroupDataList(T[] datas, out List<GroupModel> groupModels, out int result)
+        {
+            var attribute = typeof(T).GetCustomAttribute<SplitTableAttribute>() as SplitTableAttribute;
+            Check.Exception(attribute == null, $"{typeof(T).Name} need SplitTableAttribute");
+            groupModels = new List<GroupModel>();
+            var db = this.Context;
+            foreach (var item in datas)
+            {
+                var value = db.SplitHelper<T>().GetValue(attribute.SplitType, item);
+                var tableName = db.SplitHelper<T>().GetTableName(attribute.SplitType, value);
+                groupModels.Add(new GroupModel() { GroupName = tableName, Item = item });
+            }
+            result = 0;
+        }
+        internal class GroupModel
+        {
+            public string GroupName { get; set; }
+            public T Item { get; set; }
+        }
+    }
+}