Which is better ,Search through query and whole text document or search through query with document field.

[Rajendra Rao]

Hello,

I have query and document.Its unstructured & natural  text.I used lucene
for searching document on query.If I  separate Document into field and then
search.what will be difference?
I can't check it because now i don't have field separated data .But in
future we will have.

Thanks.