How is a query with 'string' columns in it, gets executed?

Hello,

I am looking into these column oriented databases for a while and wondered with monetdb's performance over others.

I started studying about monet and found very interesting. Many concepts you use are really interesting.

I want to know how monet executes a query which contain string columns in it. Does it maintain a dictionary or what kind of index it uses or is there any inverted index involved for strings etc.,

Any kind of material, source code portions or any other documentation regarding this, is most welcome. I would love to contribute back from my side once I get to know what is happening.

Regards, Mit