(ITS#7644) inverted MDB_SET_RANGE desired

[vissermc@gmail.com]

Full_Name: Michiel Visser
Version: 2.4.35
OS: Linux
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (88.159.211.22)


Feature request:
MDB_SET_RANGE is an important option for me (I'm implementing a generic triple
store on top of MDB). But I also desire some additions:
1) let's call it MDB_SET_RANGE_INV: find key equal of smaller. In theory I could
also apply an inverted compare function, but this makes it counter-intuitive
('bigger' actually implying 'smaller'). And I understand I can also use
SET_RANGE, followed by a cursor-previous-traversal, but it would require extra
logic to check whether the key is already equal, which brings me to my second
point:
2) a way to see whether the returned key is equal (to the supplied key), to
avoid another call to get/cursor_get, or avoid a manual key compare.