Alvaro Herrera <alvherre@2ndquadrant.com> writes:
> ... all plan types that use only one child use the outer one. They
> could use either, as long as it does that consistently, I think.
Yeah, exactly. The outer/inner terminology is really only sensible
for join nodes, but there isn't a third child-plan pointer reserved
for single-child node types, so you gotta use one of those. And
conventionally we use the "outer" one.
regards, tom lane
