Richard Broersma Jr <rabroersma(at)yahoo(dot)com> writes:
> In my reading of SQL for smarties I've stumbled across syntax that is supported by Postgresql.
> However, I can't find mention of it in the Postgresql Docs.
Which part of this do you claim is not documented? It looks to me like
it's all covered in one of
http://developer.postgresql.org/pgdocs/postgres/functions-comparison.html
http://developer.postgresql.org/pgdocs/postgres/functions-comparisons.html#ROW-WISE-COMPARISON
regards, tom lane