Boosting score of a document without deleting and adding another document

[karan veer singh]

I want to add score for documents dynamically. For 
this, the method that I know right now is to use "add". Using this 
method, everytime I need to get the contents of that document, and then 
add another record with the boost field. Is there a way in which I can 
just specify the boost attribute value, and not have to delete and add 
the whole document?


Thanks