[elephant-devel] Dropping values

[Ian Eslick]

Hi Edward,

I'm unable to reproduce with my local version of the latest Elephant (latest, ccl64, DB 4.7, Mac).  Can you give me a transcript like:

(setf btree (make-btree))
(setf (get-value 'foo btree) 10)
(setf (get-value 'bar btree) 20)
(dump-btree btree)
(remove-kv 'foo btree)
(dump-btree btree)

It's possible that there is some low-level issue talking to the DB API in the FFI between Elephant and BDB.  I don't have time to test on SBCL today, but perhaps someone else does.  I might be able to get to it this weekend.

Thanks,
Ian

On Dec 17, 2009, at 4:30 AM, Edward Tate wrote:

> Hey,
> 
> I'm using the latest elephant on SBCL 1.0.29 with BDB 4.7, and I'm getting strange behaviour.
> 
> * Using remove-kv doesn't actually delete keys from a btree.
> * Using drop-btree doesn't actually drop the btree.
> * Using flush-instance-cache doesn't seem to help.
> * Doing a full GC doesn't seem to help.
> 
> Is there a way of removing data permanently?
> 
> Cheers,
> Edward Tate
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