Amit Langote <amitlangote09@gmail.com> writes:
> Should the following paragraph in src/backend/optimizer/README be
> updated to reflect the new reality after recent changes?
> An EquivalenceClass can contain "em_is_child" members, which are copies
> of members that contain appendrel parent relation Vars, transposed to
> contain the equivalent child-relation variables or expressions.
Hm. They still are "in" the EquivalenceClass in a very real sense;
there is no other data structure that links to them. So this isn't
incorrect. I do get your feeling that maybe some rewording is
warranted, but I'm not sure what.
regards, tom lane