Split table

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

@@ -20,12 +20,17 @@ namespace OrmTest
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true
             });
+            db.Aop.OnLogExecuted = (s, p) =>
+            {
+                Console.WriteLine(s);
+            };
             db.CodeFirst.SplitTables().InitTables<OrderSpliteTest>();
-            db.Queryable<OrderSpliteTest>().SplitTable(it => it.Take(3)).ToList();
+            var list=db.Queryable<OrderSpliteTest>().SplitTable(tabs => tabs.Take(3)).ToList();
+          
             Console.WriteLine("#### CodeFirst end ####");
         }
 
-        [SqlSugar.SugarTable("Order{year}{month}{day}")]
+        [SqlSugar.SugarTable("Taxxx0101{year}{month}{day}")]
         public class OrderSpliteTest 
         {
             [SugarColumn(IsPrimaryKey =true)]

Src/Asp.Net/SqlSugar/Abstract/CodeFirstProvider/SplitCodeFirstProvider.cs

@@ -11,7 +11,7 @@ namespace SqlSugar
         public SqlSugarProvider Context;
         public void InitTables<T>()
         {
-            this.Context.InitMappingInfo<T>();
+            var oldMapping = this.Context.Utilities.TranslateCopy(this.Context.MappingTables);
             SplitTableHelper helper = new SplitTableHelper()
             {
                 Context = this.Context,
@@ -23,7 +23,7 @@ namespace SqlSugar
             {
                 foreach (var item in tables)
                 {
-                    this.Context.MappingTables.Add(helper.EntityInfo.EntityName, item);
+                    this.Context.MappingTables.Add(helper.EntityInfo.EntityName, item.TableName);
                     this.Context.CodeFirst.InitTables(typeof(T));
                 }
             }

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

@@ -834,7 +834,7 @@ namespace SqlSugar
             }
             return result;
         }
-        public ISugarQueryable<T> SplitTable(Func<List<string>, IEnumerable<string>> getTableNamesFunc) 
+        public ISugarQueryable<T> SplitTable(Func<List<SplitTableInfo>, IEnumerable<SplitTableInfo>> getTableNamesFunc) 
         {
             SplitTableHelper helper = new SplitTableHelper() 
             { 
@@ -845,9 +845,9 @@ namespace SqlSugar
             List<ISugarQueryable<object>> tableQueryables = new List<ISugarQueryable<object>>();
             foreach (var item in tables)
             {
-                tableQueryables.Add(this.Context.Queryable<object>().AS(item));
+                tableQueryables.Add(this.Context.Queryable<object>().AS(item.TableName));
             }
-            var asName = this.Context.UnionAll(tableQueryables.ToArray()).Select<T>().ToSql().Key;
+            var asName = this.Context.UnionAll(tableQueryables.ToArray()).QueryBuilder.GetTableNameString;
             return this.AS(asName);
         }
         public ISugarQueryable<T> Distinct()

Src/Asp.Net/SqlSugar/Interface/IQueryable.cs

@@ -179,7 +179,7 @@ namespace SqlSugar
         DataTable ToPivotTable<TColumn, TRow, TData>(Func<T, TColumn> columnSelector,Expression<Func<T, TRow>> rowSelector,Func<IEnumerable<T>, TData> dataSelector);
         List<dynamic> ToPivotList<TColumn, TRow, TData>(Func<T, TColumn> columnSelector, Expression<Func<T, TRow>> rowSelector, Func<IEnumerable<T>, TData> dataSelector);
         string ToPivotJson<TColumn, TRow, TData>(Func<T, TColumn> columnSelector, Expression<Func<T, TRow>> rowSelector, Func<IEnumerable<T>, TData> dataSelector);
-        ISugarQueryable<T> SplitTable(Func<List<string>,IEnumerable<string>> getTableNamesFunc);
+        ISugarQueryable<T> SplitTable(Func<List<SplitTableInfo>,IEnumerable<SplitTableInfo>> getTableNamesFunc);
     }
     public partial interface ISugarQueryable<T, T2> : ISugarQueryable<T>
     {

Src/Asp.Net/SqlSugar/SpliteTable/SplitHelper.cs

@@ -11,18 +11,110 @@ namespace SqlSugar
     {
         public SqlSugarProvider Context { get; set; }
         public EntityInfo EntityInfo { get; set; }
-        public List<string> GetTables()
+        public List<SplitTableInfo> GetTables()
         {
 
             var tableInfos = this.Context.DbMaintenance.GetTableInfoList(false);
-            var regex = EntityInfo.DbTableName.Replace("{year}", "[0-9]{4}").Replace("{day}", "[0-9]{2}").Replace("{month}", "[0-9]{4}");
+            SplitTableHelper.CheckTableName(EntityInfo.DbTableName);
+            var regex = EntityInfo.DbTableName.Replace("{year}", "([0-9]{2,4})").Replace("{day}", "([0-9]{1,2})").Replace("{month}", "([0-9]{1,2})");
             var currentTables = tableInfos.Where(it => Regex.IsMatch(it.Name, regex, RegexOptions.IgnoreCase)).Select(it => it.Name).Reverse().ToList();
-            return currentTables;
+            List<SplitTableInfo> result = new List<SplitTableInfo>();
+            foreach (var item in currentTables)
+            {
+                SplitTableInfo tableInfo = new SplitTableInfo();
+                tableInfo.TableName = item;
+                var math = Regex.Match(item, regex);
+                var group1 = math.Groups[1].Value;
+                var group2 = math.Groups[2].Value;
+                var group3 = math.Groups[3].Value;
+                tableInfo.Date = GetDate(group1,group2,group3, EntityInfo.DbTableName);
+                result.Add(tableInfo);
+            }
+            result = result.OrderByDescending(it => it.Date).ToList();
+            return result;
+        }
+
+        #region Helper
+        private DateTime GetDate(string group1, string group2, string group3, string dbTableName)
+        {
+            var yearIndex = dbTableName.IndexOf("{year}");
+            var dayIndex = dbTableName.IndexOf("{day}");
+            var monthIndex = dbTableName.IndexOf("{month}");
+            List<SplitTableSort> tables = new List<SplitTableSort>();
+            tables.Add(new SplitTableSort() { Name = "{year}", Sort = yearIndex });
+            tables.Add(new SplitTableSort() { Name = "{day}", Sort = dayIndex });
+            tables.Add(new SplitTableSort() { Name = "{month}", Sort = monthIndex });
+            tables = tables.OrderBy(it => it.Sort).ToList();
+            var year = "";
+            var month = "";
+            var day = "";
+            if (tables[0].Name == "{year}")
+            {
+                year = group1;
+            }
+            if (tables[1].Name == "{year}")
+            {
+                year = group2;
+            }
+            if (tables[2].Name == "{year}")
+            {
+                year = group3;
+            }
+            if (tables[0].Name == "{month}")
+            {
+                month = group1;
+            }
+            if (tables[1].Name == "{month}")
+            {
+                month = group2;
+            }
+            if (tables[2].Name == "{month}")
+            {
+                month = group3;
+            }
+            if (tables[0].Name == "{day}")
+            {
+                day = group1;
+            }
+            if (tables[1].Name == "{day}")
+            {
+                day = group2;
+            }
+            if (tables[2].Name == "{day}")
+            {
+                day = group3;
+            }
+            return Convert.ToDateTime($"{year}-{month}-{day}");
         }
 
         public string GetDefaultTableName()
         {
-            throw new NotImplementedException();
+            var date = this.Context.GetDate();
+            var result = EntityInfo.DbTableName.Replace("{year}", date.Year + "").Replace("{day}", PadLeft2(date.Day + "")).Replace("{month}", PadLeft2(date.Month + ""));
+            return result;
+        }
+
+        private string PadLeft2(string str)
+        {
+            if (str.Length < 2)
+            {
+                return str.PadLeft(2, '0');
+            }
+            else
+            {
+                return str;
+            }
         }
+
+        private static void CheckTableName(string dbTableName)
+        {
+            Check.Exception(!dbTableName.Contains("{year}"), ErrorMessage.GetThrowMessage("table name need {year}", "分表表名需要占位符 {year}"));
+            Check.Exception(!dbTableName.Contains("{month}"), ErrorMessage.GetThrowMessage("table name need {month}", "分表表名需要占位符 {month} "));
+            Check.Exception(!dbTableName.Contains("{day}"), ErrorMessage.GetThrowMessage("table name need {day}", "分表表名需要占位符{day}"));
+            Check.Exception(Regex.Matches(dbTableName, @"\{year\}").Count > 1, ErrorMessage.GetThrowMessage(" There can only be one {year}", " 只能有一个 {year}"));
+            Check.Exception(Regex.Matches(dbTableName, @"\{month\}").Count > 1, ErrorMessage.GetThrowMessage("There can only be one {month}", "只能有一个 {month} "));
+            Check.Exception(Regex.Matches(dbTableName, @"\{day\}").Count > 1, ErrorMessage.GetThrowMessage("There can only be one {day}", "只能有一个{day}"));
+        } 
+        #endregion
     }
 }

Src/Asp.Net/SqlSugar/SpliteTable/SplitTableInfo.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SqlSugar 
+{
+    public class SplitTableInfo
+    {
+        public string TableName { get; set; }
+        public DateTime Date { get; set; }
+    }
+
+    internal class SplitTableSort 
+    {
+        public string Name { get; set; }
+        public int Sort { get; set; }
+    }
+}

Src/Asp.Net/SqlSugar/SqlSugar.csproj

@@ -212,6 +212,7 @@
     <Compile Include="DistributedSystem\Snowflake\InvalidSystemClock.cs" />
     <Compile Include="DistributedSystem\Snowflake\TimeExtensions.cs" />
     <Compile Include="SpliteTable\SplitHelper.cs" />
+    <Compile Include="SpliteTable\SplitTableInfo.cs" />
     <Compile Include="SpliteTable\SplitType.cs" />
     <Compile Include="SqlSugarClient.cs" />
     <Compile Include="Utilities\CallContext.cs" />