Dear List,
for multi term expressions I'd like to add higher rank if the matches are
closer to each other. For example for the search term "like eating" the
string "i like eating" comes before "I like some eating".
Is this possible?
Thanks in advance,
Ákos Tajti
Àkos,
have a look at SpanNearQuery. This is what you want.
If you own the 2nd Edition of Lucene in Action have a look at their
examples. It illustrates how to combine them with the classical queries.
Regards,
Em
Am 21.09.2011 13:46, schrieb Akos Tajti:
> Dear List,
>
> for multi term expression
Thanks, I will check SpanNearQuery!
Regards,
Ákos
On Wed, Sep 21, 2011 at 2:20 PM, Em wrote:
> Àkos,
>
> have a look at SpanNearQuery. This is what you want.
> If you own the 2nd Edition of Lucene in Action have a look at their
> examples. It illustrates how to combine them with the classica
PhraseQuery suffices for the stated requirement of boosting when query terms
are closer. A common technique is to incorporate a PhraseQuery with a large
slop factor of the query terms into the query automatically, which implicitly
boosts matching documents when the query terms are closer. A Sp
Hi Erik,
could you explain why PhraseQuery performs better than SpanNearQuery?
Some time has passed since I read about it, however I think it was
exactly the other way round.
Thanks!
Em
Am 21.09.2011 15:56, schrieb Erik Hatcher:
> PhraseQuery suffices for the stated requirement of boosting whe
SpanNearQuery does more work than PhraseQuery - it keeps track of all matching
spans, whereas PhraseQuery does not. Whether the performance difference will
be relevant depends on your environment and data - so it may not be a big deal
at all.
Erik
On Sep 21, 2011, at 10:44 , Em wrote
Thanks, Erik.
If PhraseQuery does not keep track of all matching spans, how does it do
its work (in comparison to SpanNearQuery)?
Regards,
Em
Am 21.09.2011 19:52, schrieb Erik Hatcher:
> SpanNearQuery does more work than PhraseQuery - it keeps track of all
> matching spans, whereas PhraseQuery d
Thanks for the hints Guys. I implemented the SpanNearQuery approach because we
might need the matching spans information.
Regards,
Ákos
On 2011.09.21., at 20:08, Em wrote:
> Thanks, Erik.
> If PhraseQuery does not keep track of all matching spans, how does it do
> its work (in comparison to
SpanNearQuery is a different kind of beast than PhraseQuery... it matches when
it's nested SpanQuery's are in proximity. So it is like multiple PhraseQuery's
and checking proximities of those with one another... or proximity with any
other type of SpanQuery.
On Sep 21, 2011, at 11:08 , Em wro
