Optimization error prompt

Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs

@@ -1203,6 +1203,7 @@ namespace SqlSugar
         public ISugarQueryable<T> SplitTable(DateTime beginTime, DateTime endTime) 
         {
             var splitColumn = this.EntityInfo.Columns.FirstOrDefault(it => it.PropertyInfo.GetCustomAttribute<SplitFieldAttribute>() != null);
+            Check.ExceptionEasy(splitColumn==null,"[SplitFieldAttribute] need to be added to the table field", "需要在分表字段加上属性[SplitFieldAttribute]");
             var columnName = this.SqlBuilder.GetTranslationColumnName(splitColumn.DbColumnName);
             var sqlParameterKeyWord = this.SqlBuilder.SqlParameterKeyWord;
             return this.Where($" {columnName}>={sqlParameterKeyWord}spBeginTime AND {columnName}<= {sqlParameterKeyWord}spEndTime",new { spBeginTime = beginTime , spEndTime = endTime}).SplitTable(tas => {