[syslog-ng] Logging To MongoDB and specifying data types

I'm using the syslog-ng windows client to forward IIS logs to syslog-ng. I'm using the CSV parser to split it into pairs and pick and choose my pairs. I'm not able to figure out how to insert a field from these pairs (or any others) into MongoDB as a date time field. They are being stored as strings. Also I'd like to store quite a few of the other columns/elements as integers. Obviously I could run a job to do conversions after they are inserted into the database I'd just hate to setup a rube golberg machine if I don't have to. -- Michael Dillon