ITS#8857 document mdb_cursor_del does not invalidate the cursor

diff --git a/libraries/liblmdb/lmdb.h b/libraries/liblmdb/lmdb.h
index 07abb9b8d7385196aa7bd39012152714e85fe8c3..d70b0c4b2d65de67e5ca153673b44c17078d97ac 100644 (file)
--- a/libraries/liblmdb/lmdb.h
+++ b/libraries/liblmdb/lmdb.h
@@ -1553,6 +1553,10 @@ int  mdb_cursor_put(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
        /** @brief Delete current key/data pair
         *
         * This function deletes the key/data pair to which the cursor refers.
+        * This does not invalidate the cursor, so operations such as MDB_NEXT
+        * can still be used on it.
+        * Both MDB_NEXT and MDB_GET_CURRENT will return the same record after
+        * this operation.
         * @param[in] cursor A cursor handle returned by #mdb_cursor_open()
         * @param[in] flags Options for this operation. This parameter
         * must be set to 0 or one of the values described here.