: Is this correct? bf is a boosting function, so a function is needed there, no?
: If I'm not missing someting, the ^0.5 is just a boost, and "popularity" : is just a (numeric) field. So boosting a numeric field wouldn't make : sense, but appying it to a function would. Am I missing something? the function parser "does the right thing" when you give it a bare field name, from the javadocs... http://lucene.apache.org/solr/api/org/apache/solr/search/QueryParsing.html#parseFunction(java.lang.String,%20org.apache.solr.schema.IndexSchema) // Numeric fields default to correct type // (ie: IntFieldSource or FloatFieldSource) // Others use implicit ord(...) to generate numeric field value myfield you are correct about 0.5 being the boost, using either the _val_ hack on the SolrQueryParser or using he bf param of dismax the ^0.5 will be used as a boost on the resulting function query... qt=standard&q=%2Bfoo%20_val_:popularity^0.5 qt=dismax&q=foo&bf=popularity^0.5 -Hoss
