On Tue, May 17, 2011 at 6:17 PM, Markus Jelsma
<markus.jel...@openindex.io> wrote:
> I'm not sure. The filter cache uses your filter as a key and a negation is a
> different key. You can check this easily in a controlled environment by
> issueing these queries and watching the filter cache statistics.
Gotta hate crossing emails ;-)
Anyway, this goes back to Solr 1.1
5. SOLR-80: Negative queries are now allowed everywhere. Negative queries
are generated and cached as their positive counterpart, speeding
generation and generally resulting in smaller sets to cache.
Set intersections in SolrIndexSearcher are more efficient,
starting with the smallest positive set, subtracting all negative
sets, then intersecting with all other positive sets. (yonik)
-Yonik
http://www.lucenerevolution.org -- Lucene/Solr User Conference, May
25-26, San Francisco
>> If I have a query with a filter query such as : " q=art&fq=history" and
>> then run a second query "q=art&fq=-history", will Solr realize that it
>> can use the cached results of the previous filter query "history" (in the
>> filter cache) or will it not realize this and have to actually do a second
>> filter query against the index for "not history"?
>>
>> Tom
>
