"=?ISO-8859-1?B?QW5kcmUgTGlu?=" <857348270@qq.com> writes:
> > After contemplating that for awhile, by far the least painful way
> > seems to be to add the subLinkId to struct SubPlan. We can get
> > away with that in the back branches as long as we add it at the
> > end, since SubPlans don't get recorded in the catalogs.
> But let's assume that we manage to verify initplan/subplan by adding
> subLinkId to SubPlan, we still have problem. In short, the exact
> subqueryid of the new MULTIEXPR Param will be pain in the ass...
Well, yeah, that data structure would need to change.
regards, tom lane