On Thu, Feb 16, 2023 at 5:13 AM PG Doc comments form <nore...@postgresql.org> wrote:
> The following documentation comment has been logged on the website: > > Page: https://www.postgresql.org/docs/15/sql-select.html > Description: > > The syntax documentation for SELECT in SQL COMMANDS section is unclear in > explaining how to use multiple window definitions. It's easy to read it > and > believe that multiple WINDOW keywords, one for each definition, are > correct, > which is not the case. > > See this stackoverflow question and answer on point: > > https://stackoverflow.com/questions/59651529/multiple-named-windows-in-a-postgres-query > > This is how we've chosen to document this kind of grammar and I don't see a compelling reason to revisit that decision on the basis of this report. I could consider some additional wording regarding "each clause keyword only ever appears once in a given (sub)query" though that seems almost self-evident as part of the learning of SQL. The fact that you write WINDOW and then a comma-separated listing of names plus definitions is how that syntax diagram is read, just like with WITH, FROM, and GROUP BY clauses in the same diagram. David J.
