This is a known limitation of using the SynonymFilter and expanding to variants of different sizes at query time. See the notes for SynonymFilterFactory here: http://wiki.apache.org/solr/AnalyzersTokenizersTokenFilters#head-2c461ac74b4ddd82e453dc68fcfc92da77358d46
-Yonik http://www.lucidimagination.com On Tue, Mar 31, 2009 at 3:24 PM, Leonardo Dias <leona...@catho.com.br> wrote: > Hello there. How are you guys? > > We're having problems with synonyms here and I thought that maybe you guys > could help us on how SOLR works for synonyms. > > The problem is the following: I'd like to setup a synonym like "dba, > database administrator". > > Instead of increasing the number of results for the keyword "dba", the > results got smaller and it only brought me back results that had both the > keywords "dba" and "database administrator" at the same time instead of > bringing back both "dba" and "database administrator" as expected since our > synonym configuration is using expand=true. > > Since in the past this was not the expected behavior, I'd like to know > whether something changed in the solr/lucene internals so that this > functionality is now lost, or if I'm doing something wrong with my setup. > > Currently all fields pass through the Synonym filter factory. The analysis > shows me that it tries to search for database administrator and DBA. A debug > query also shows me that the query it's trying to do is something like this: > > +DisjunctionMaxQuery((title:"(dba datab) administr")~0.1) > DisjunctionMaxQuery((title:"(dba datab) administr"^100000.0 | > observation:"(dba datab) administr"^10.0 | description:"(dba datab) > administr"^10.0 | company:"(dba datab) administr")~0.1) > > The problem is: when I search for this, I get 5 results. When I search for > dba only, without the "dba, database administrator" line in the synonyms.txt > file, I get more than 100 results. > > Do you guys know why this is happening? > > Thank you, > > Leonardo >
