Re: Issues arising from creating powerdns backend based on LMDB

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I've found another weird - I have now converted the database to use duplicates. Typically when I do mdb_cursor_get(... MDB_NEXT ) it will set the key and value but I've found 1 place so far where I do it and on the duplicate's second entry the value is set but the key is empty.

I don't see how this can happen; the only time we don't return the key is if some operation actually failed. Can you send test code to reproduce this?

Attached .c shows it - create 3 keys with 5 entries under each. Actually my report was incorrect - cursor_get() with MDB_NEXT or MDB_NEXT_DUP never seems to set the key unless it is the first entry read... Perhaps this is intended?!

Mark