Howard Chu wrote:
Markus Junginger wrote:
>> There was never a bug here. The doc is quite explicit
>>
http://www.lmdb.tech/doc/group__mdb.html#ga73a5938ae4c3239ee11efa07eb22b882
>>
>> After txn_abort the only valid call on a still-open cursor is
>> cursor_renew, not cursor_close.
>
> However you want to call it, are you open to improve this workflow?
>
> API-wise, it would be so much simpler just to free a cursor after it became
> obsolete. It's counter-intuitive to open a new txn, renew the cursor, close
> the cursor, and abort the txn - just to close a cursor.
API-wise, it is much simpler to just close the cursor before closing its
transaction, if you have no need to reuse the cursor.
To be explicit - a typical workflow, as outlined in the Getting Started guide:
Open an env
Open a txn inside the env
Open a cursor inside the txn
When finished:
Close cursor inside txn
Close txn inside env
Close env
The only reason the API allows a read cursor to exist outside of its creating
read txn is to allow it to be reused in a later read txn. If you're not
reusing it then you should just close it in the proper order.
--
-- Howard Chu
CTO, Symas Corp.
http://www.symas.com
Director, Highland Sun
http://highlandsun.com/hyc/
Chief Architect, OpenLDAP
http://www.openldap.org/project/