My apologies if this answer is readily available someplace, I've searched around and not found a definitive answer.
I'd like to run a query for documents that _do not_ contain particular indexed fields to implement something like a SQL-like query where a column is null. I understand I could possibly use a magic value to represent "null", but the data I'm searching doesn't led itself to reserving a value for null. I also understand I could add an extra field to hold this boolean isNull state but would love a better solution :-) TIA
