Re: security label support, part.2

2010/8/18 KaiGai Kohei <kaigai@ak.jp.nec.com>:
>> It's also worth pointing out that the hook in ExecCheckRTPerms() does
>> not presuppose label-based security.  It could be used to implement
>> some other policy altogether, which only strengthens the argument that
>> we can't know how the user of the hook wants to handle these cases.
>>
> If rte->requiredPerms would not be cleared, the user of the hook will
> be able to check access rights on the child tables, as they like.
> How about an idea to add a new flag in RangeTblEntry which shows where
> the RangeTblEntry came from, instead of clearing requiredPerms?
> If the flag is true, I think ExecCheckRTEPerms() can simply skip checks
> on the child tables.

Something along those lines might work, although I haven't yet
scrutinized the code well enough to have a real clear opinion on what
the best way of dealing with this is.

--
Robert Haas
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