On Fri, Mar 31, 2017 at 2:45 PM, <kbran...@pwhome.com> wrote: > > I can go with that now that I understand it (and I did not read the docs > that way), but I guess I was expecting it to see that "upper(name)" isn't > there, so it should pull that expression apart, find "name" and see that in > the output list before it starts searching the input list. After all, > that's what happens when it wants to search the input list, it's torn the > expression apart to find a column name. So why did it not look for "name" > in the output list but was willing to do that for the input list. I guess > that was really the heart of my question. :) > > This probably comes up twice a year or so. The depth of detail of the answer depends on who decided to respond. No ones seem motivated enough to write a decent FAQ article...and enough people are willing to just answer to the (public/searchable)
Here's a decent context response by Tom Lane that I quickly found from a few years back. https://www.postgresql.org/message-id/12023.1376506569%40sss.pgh.pa.us David J.
