I propose removing the "Included attributes in B-tree indexes"
top-level section of chapter 63 from the user facing documentation.
Chapter 63 concerns B-Tree operator classes themselves, in the
abstract, so the fact that an operator class isn't needed for extra
covering index columns isn't appropriate. It seems sufficient to only
mention this once, in the CREATE INDEX docs.
Attached patch shows what I have in mind -- the total removal of this
top-level section.
--
Peter Geoghegan