Some more experiments have helped me answer my own questions. > Q1. Can anyone confirm whether bf and bq can both > be used together in solrconfig.xml? yes
> Q3. Can I have multiple bq parameters? If so, do I > space-separate them as a single bq, or provide > multiple BQs? Yes, multiple bq parameters work, space-separating multiple query terms in a single bq also works. Here's a snippet of my solrconfig.xml: <str name="bq">published_date_d:[NOW-3MONTHS/DAY TO NOW/DAY+1DAY]^5.2 OR (published_date_d:[NOW-12MONTHS/DAY TO NOW/DAY+1DAY] AND report_type_id_i:10000004)^10.0 OR (published_date_d:[NOW-6MONTHS/DAY TO NOW/DAY+1DAY] AND is_printed_b:true)^4.0</str> <str name="bq">is_mp_parent_b:false^10.0</str> <str name="bf">recip(rord(published_date_d),20,5000,5)^5.5</str> -----Original Message----- From: Dean Missikowski (Consultant), CLSA Sent: 08/03/2009 12:01 PM To: solr-user@lucene.apache.org Subject: Query Boosting using both BQ and BF Hi, I have a couple of questions related to query boosting using the dismax request handler. I'm using a recent 1.4 build (to take advantage of omitTf), and have also tried all of this with 1.3. To apply a query-time boost to the previous 3 months of documents in my index I use: <str name="bq">published_date_d:[NOW-3MONTHS/DAY TO NOW/DAY+1DAY]^10.2 </str> And, to provide a boosting that helps rank recently documents higher I use: <str name="bf">recip(rord(published_date_d),20,5000,5)^5.5</str> This seems to be working well. But I have more boosting requirements. For example, I need to boost documents that are tagged as printed. So, I tried to add another bq parameter: <str name="bq">is_printed_b:true^4.0</str> Also, tried to append this space-separated all in one bq parameter like this: <str name="bq">published_date_d:[NOW-3MONTHS/DAY TO NOW/DAY+1DAY]^10.2 is_printed_b:true^4.0</str> Lastly, I need to apply a negative boost to documents of a certain type, so I use: <str name="bq">-is_mp_parent_b:true^50.0</str> Not sure if it matters, but I have <solrQueryParser defaultOperator="AND"/> in schema.xml None of those variations return expected results (it's like the bq is being applied as a filter instead of just applying boosts). Q1. Can anyone confirm whether bf and bq can both be used together in solrconfig.xml? Q2. Is there a way I can do ths using only BF? How? Q3. Can I have multiple bq parameters? If so, do I space-separate them as a single bq, or provide multiple BQs? Q3. Am I formulating my BQs that use Boolean fields correctly? Any help or insights much appreciated, Thanks Dean CLSA CLEAN & GREEN: Please consider our environment before printing this email. The content of this communication is subject to CLSA Legal and Regulatory Notices. These can be viewed at https://www.clsa.com/disclaimer.html or sent to you upon request.
