SQL Server：拒绝在重新创建的表上选择

问题描述

在sql Server 2017中，我有一个具有ddladmin特权的用户，该用户会定期删除并重新创建表。我们需要在该表上拒绝选择。

仅当删除表时，它才会丢失拒绝。我不想授予用户securityadmin。

如何确保每次重新创建该表时都保留拒绝选择？

解决方法

...调整

revert
go

-- drop trigger deny_select_on_frequentlydroppedtable on database
create or alter trigger deny_select_on_frequentlydroppedtable 
on database  
with execute as 'dbo' 
for CREATE_TABLE
as
begin
    set nocount on;
    
    --when table name = frequentlydroppedtable
    if EVENTDATA().value('(EVENT_INSTANCE/ObjectName)[1]','sysname') = 'frequentlydroppedtable' 
    begin
        declare @tbl nvarchar(500) = concat(quotename(EVENTDATA().value('(EVENT_INSTANCE/SchemaName)[1]','sysname')),'.',quotename(EVENTDATA().value('(EVENT_INSTANCE/ObjectName)[1]','sysname')));
        declare @user nvarchar(150) = EVENTDATA().value('(EVENT_INSTANCE/UserName)[1]','sysname');
        
        if @user <> 'dbo' and IS_ROLEMEMBER('db_owner',@user) = 0 and IS_ROLEMEMBER('db_ddladmin',@user) = 1 --... any ddl admin gets deny when they create the table :)
        begin
            declare @sql nvarchar(500) = 'deny select on ' + @tbl + ' to ' + quotename(@user);
            exec(@sql)
        end
    end
end
go

--dbo or ....
drop table if exists frequentlydroppedtable;
go
create table frequentlydroppedtable(id int);
go
--works
select * from frequentlydroppedtable
go


--create a test db_ddladmin
create user test_db_ddladmin without login;
go
alter role db_ddladmin add member test_db_ddladmin;
go
execute as user = 'test_db_ddladmin'
go
drop table if exists frequentlydroppedtable;
go
create table frequentlydroppedtable(id int);
go
--permission violation,deny select
select * from frequentlydroppedtable
go

revert
go

--cleanup
drop table if exists frequentlydroppedtable;
go
drop user test_db_ddladmin;
go
drop trigger deny_select_on_frequentlydroppedtable on database
go

grant sql-server