Gurjeet Singh <singh.gurjeet@gmail.com> writes:
> BTW, you use the term 'fictitious' in the comments, would it be better
> to standardize the term used for such an index? So either the comment would
> be changed to call it hypothetical, or the structure member would be changed
> to isfictitious.
Yeah, hypothetical is the more-established term I think.
regards, tom lane