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(ITS#7570) fix MDB_GET_MULTIPLE and MDB_NEXT_MULTIPLE behaviour
Full_Name: Claude Brisson
OS: linux 64
Submission from: (NULL) (22.214.171.124)
In a db with MDB_DUPSORT flag, when there is only one DUP data for a key,
F_DUPDATA is not set for this key, and there is no sub-cursor.
In this case, the current behaviour of MDB_GET_MULTIPLE and MDB_NEXT_MULTIPLE is
broken because they make the assumption that there is always a sub-cursor for
DUP data, which is only true for keys with more than one DUP data.
This patch address this specific issue.
Notice: I, Claude Brisson, hereby place the following modifications to OpenLDAP
Software (and only these modifications) into the public domain. Hence, these
modifications may be freely used and/or redistributed for any purpose with or
without attribution and/or other notice.