Re: db->seq never gets to end

On Thu, Aug 09, 2007 at 10:57:39PM -0500, Jeremy C. Reed wrote:
> Hopefully this list is okay ...
> 
> I am using:
> 
>         for (r = db->seq(db, &dbk, &dbd, R_FIRST); !r;
>             r = db->seq(db, &dbk, &dbd, R_NEXT)) {
> 
> But sometimes it never ends.
> 
> I added a counter. And it would get to hundreds of thousands and data 
> would repeat. I only have less than 1500 keys. I'd also get dbd.size that 
> would be hundreds of thousands of bytes (but should only be 20 bytes).
> 
> Is there any way to ask the hash(3) how many elements it has?

Maybe it's just me, but I didn't even realise that you could
do a sequential scan of a hashed database. dbopen(3) says:

              R_LAST  and  R_PREV  are  available  only  for  the
              DB_BTREE and DB_RECNO access methods  because  they
              each  imply  that  the  keys have an inherent order
              which does not change.

Given that statement, I don't see how R_FIRST and R_NEXT are
any different, but I'm getting old and confused.

Was this software meant to use a different version of Berkeley
db?

Regards,
Alistair