The "map" function lets you replace an arbitrary range of values with a new value, so you could "map" any value greater then the ms that today started on to any other point in history...
http://wiki.apache.org/solr/FunctionQuery#map An easier approach would be probably be to apply some logic at index time: you can still index the the Last-Modified date you are getting, but if you believe that date is artificial, you can index an alternate date (possibly based on some rules you know about the site, or reuse the "first' last modified date you ever got for that URL, etc...) in a distinct field and use that value for date boosting. : I am trying to boost newer documents in Solr queries. The ms function : http://wiki.apache.org/solr/SolrRelevancyFAQ#How_can_I_boost_the_score_of_newer_documents : seems to be the right way to go, but I need to add an additional : condition: : I am using the last-Modified-Date from crawled web pages as the date : to consider, and that does not always provide a meaningful date. : Therefore I would like the function to only boost documents where the : date (not time) found in the last-Modified-Date is different from the : timestamp, eliminating results that just return the current date as : the last-Modified-Date. Suggestions are appreciated! : -Hoss
