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
