[Xapian-devel] how to change the default operator?

Olly Betts olly at survex.com
Sat Mar 26 05:44:16 GMT 2011

On Sat, Mar 26, 2011 at 12:51:18AM +0800, Shen Li wrote:
> The eruptions of information in the last decade have definitely
> expanded the dimension and size of the data collection to an extremely
> great extent. That makes it even harder to reach out to something
> we're really looking for, and possibly that's why we now need more
> exact filter to get rid of the nonsense.

A (probably related) factor is that users expect AND as the default,
because it is now pretty much universally the default for search.

> As for "operator chain", I intended to mean a combination of maybe 2-3
> operators applied in a particular order. For instance, use NEAR first
> and then use FILTER to narrow down. I know this could be expensive in
> time and efficiency, but I just want to try whether it could work and
> what could be the possible result. 

I still don't understand what you're suggesting (particular as FILTER
will match more documents than NEAR).  Can you give an example of how
this would work?


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