Add: SugarColumn(QuerySql=" getdate() ")

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

@@ -362,6 +362,7 @@ namespace SqlSugar
                         column.UpdateServerTime= sugarColumn.UpdateServerTime;
                         column.UpdateSql= sugarColumn.UpdateSql;
                         column.IsDisabledAlterColumn = sugarColumn.IsDisabledAlterColumn;
+                        column.QuerySql = sugarColumn.QuerySql;
                         if (sugarColumn.IsJson && String.IsNullOrEmpty(sugarColumn.ColumnDataType))
                         {
                             if (this.Context.CurrentConnectionConfig.DbType == DbType.PostgreSQL)

Src/Asp.Net/SqlSugar/Abstract/SqlBuilderProvider/QueryBuilder.cs

@@ -907,7 +907,7 @@ namespace SqlSugar
                 {
                     columns = columns.Where(c => !this.IgnoreColumns.Any(i => c.PropertyName.Equals(i, StringComparison.CurrentCultureIgnoreCase) || c.DbColumnName.Equals(i, StringComparison.CurrentCultureIgnoreCase))).ToList();
                 }
-                result = string.Join(",", columns.Select(it => pre + Builder.GetTranslationColumnName(it.EntityName, it.PropertyName)));
+                result = string.Join(",", columns.Select(it => GetSelectStringByColumnInfo(it, pre)));
             }
             else
             {
@@ -920,6 +920,16 @@ namespace SqlSugar
             }
             return result;
         }
+
+        private string GetSelectStringByColumnInfo(EntityColumnInfo it, string pre)
+        {
+            if (it.QuerySql.HasValue()) 
+            {
+                return it.QuerySql+ " AS "+ Builder.GetTranslationColumnName(it.EntityName, it.PropertyName);
+            }
+            return pre + Builder.GetTranslationColumnName(it.EntityName, it.PropertyName);
+        }
+
         public virtual string GetWhereValueString
         {
             get

Src/Asp.Net/SqlSugar/Entities/EntityColumnInfo.cs

@@ -47,5 +47,6 @@ namespace SqlSugar
         public string UpdateSql { get; set; }
         public object ExtendedAttribute { get;  set; }
         public bool IsDisabledAlterColumn { get;  set; }
+        public string QuerySql { get;  set; }
     }
 }

Src/Asp.Net/SqlSugar/Entities/Mapping/SugarMappingAttribute.cs

@@ -210,6 +210,7 @@ namespace SqlSugar
         public int CreateTableFieldSort { get; set; }
         public bool InsertServerTime { get; set; }
         public string InsertSql { get; set; }
+        public string QuerySql { get; set; }
         public bool UpdateServerTime { get; set; }
         public string UpdateSql { get; set; }
         public object ExtendedAttribute{ get; set; }