Tom Lane <[EMAIL PROTECTED]> writes: > Neil Conway <[EMAIL PROTECTED]> writes: > > On Fri, 2003-03-21 at 12:12, Tom Lane wrote: > >> (No problem here with adding the noise-word option, of course.) > > > Note that it won't be a noise word: if NO SCROLL is specified, an > > attempt to do a backward fetch on a non-scrollable cursor will yield an > > error.
Does the spec *require* an error, or merely say that backward fetches aren't required to work? Most specs don't impose many restrictions on what happens if the user does non conformant things. The SQL spec is a bit, er, nonstandard in that respect, but even for it I'm a bit surprised that it would explicitly say that if NO SCROLL is specified that backward fetches have to produce an error. The only possible rationale I could see for the spec imposing that kind of restriction would be a security concern if an middleware layer allocates a NO SCROLL cursor, pages forward, and then allows an upper tier to do unrestricted operations on that cursor trusting the database not to allow scrolling back. -- greg ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org
