On Fri, Feb 09, 2018 at 08:30:49AM -0800, Andres Freund wrote:
> On 2018-02-09 09:42:41 -0500, Tom Lane wrote:
>> It doesn't look significantly different to me than the restriction
>> that you can't have sub-selects in CHECK expressions, index
>> expressions, etc. Obviously we need a clean failure like you get for
>> those cases. But otherwise it's an OK restriction that stems from
>> exactly the same cause: we do not want to invoke the full planner in
>> this context (and even if we did, we don't want to use the full
>> executor to execute the result).
>
> +1
+1.
--
Michael