Term Vector Query on Single Document

[Tod]

I have a couple of semi-related questions regarding the use of the Term 
Vector Component:

- Using curl is there a way to query a specific document (maybe using 
Tika when required?) to get a distribution of the terms it contains?

- When I set the termVector on a field do I need to reindex?  I'm 
thinking 'yes'

- How expensive is setting the termVector on a field?


Thanks - Tod