Alexey Klyukin <alexk@commandprompt.com> wrote:
> Function calls can appear in the FROM clause. (This is especially
> useful for functions that return result sets, but any function can
> be used.) This acts as though its output were created as a
> temporary table for the duration of this single SELECT command.
It doesn't say that operators which provide equivalent functionality
to functions can also be used.
-Kevin