- Enables or disables the query planner's use of index-scan plan
- types. The default is <literal>on</literal>. + Enables or disables the query planner's use of index-scan and + index-only-scan plan types. The default is <literal>on</literal>. + Also see <xref linkend="guc-enable-indexonlyscan"/>.
I think the original wording "index-scan plan types" is what is confusing me. The plural types is turning index-scan plan into a category of plans rather than the single plan type "index scan".
Your proposed wording actually (accidentally?) fixes this because now the plural types actually refers to two individual plan nodes, "index scan" and "index-only scan".
The hyphenation still reads a bit odd but ok.
I am ok with this revision (and the patch as a whole) I suppose but I still feel like something is missing here. Though probably that something would fit better in an overview page rather than trying to get the settings to explain all this to the reader.
