diff --git a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
index b21a64cea..de1a880f6 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
@@ -1349,7 +1349,11 @@ namespace SqlSugar
                 return MergeTableWithSubToListJoin();
             }
             var index = QueryBuilder.WhereIndex + 1;
-            var result = this.Context.Queryable<T>().AS(SqlBuilder.GetPackTable(sqlobj.Key, "MergeTable")).AddParameters(sqlobj.Value).Select("*").With(SqlWith.Null);
+            var result = 
+                this.EntityInfo.Discrimator.HasValue()?
+                this.Context.Queryable<object>().AS(SqlBuilder.GetPackTable(sqlobj.Key, "MergeTable")).AddParameters(sqlobj.Value).Select<T>("*").With(SqlWith.Null) 
+                :
+                this.Context.Queryable<T>().AS(SqlBuilder.GetPackTable(sqlobj.Key, "MergeTable")).AddParameters(sqlobj.Value).Select("*").With(SqlWith.Null);
             result.QueryBuilder.WhereIndex = index;
             result.QueryBuilder.NoCheckInclude = true;
             result.QueryBuilder.Includes = this.QueryBuilder.Includes;
diff --git a/Src/Asp.Net/SqlSugar/Abstract/UpdateProvider/UpdateableHelper.cs b/Src/Asp.Net/SqlSugar/Abstract/UpdateProvider/UpdateableHelper.cs
index a9012d57b..9a6c51e24 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/UpdateProvider/UpdateableHelper.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/UpdateProvider/UpdateableHelper.cs
@@ -679,6 +679,10 @@ namespace SqlSugar
                 if (IsExists(sql))
                 {
                     whereSql = Regex.Match(sql, @"\(EXISTS.+").Value;
+                    if (sql.Contains("((EXISTS")) 
+                    {
+                        whereSql = $"({whereSql}";
+                    }
                 }
                 dt = this.Context.Queryable<T>().Filter(null, true).Where(whereSql).AddParameters(parameters).ToDataTable();
             }