Hello new user here, Would just like to clarify the behavior of the solr/lucene sort param.
In this post: http://lucene.472066.n3.nabble.com/Lucene-sort-performance-roots-tp3102493p3104294.html I somehow got the impression that solr would do the sort only on the top ranking documents taken from a priority queue (is number of documents in the priority queue is based on a config parameter? can someone help point where is this parameter in the solrconfig.xml?) However in this post: http://lucene.472066.n3.nabble.com/Boosting-for-most-recent-documents-tp499286p499296.html I got the impression that sort is actually done on all the documents. (may be wrong) What I'm trying to do is actually get the most recently uploaded documents (defined by a custom timestamp field). actual query I'm thinking of is to have a q=title:* sort=upload_dt desc If #1 behavior is correct then I can't use the sort parameter as it won't be able to sort the whole result set (Though what if all the documents have the same scores? would all of the result set be included in the priority queue?). I'm guessing I can boost the document using the date instead. Though if #2 is correct I guess I can use the sort parameter (though may have memory issues if whole result set is huge) Forgive me as I am more familiar with RDBs so I'm actually more familiar with sorting on the whole result set using order by. Side note: is there a documentation/quick note or someone who can explain the order solr/lucene executes the query params ie. 1 applies filter query 2 applies query 3 applies sort something like this? like in oracle where the "where" clause is applied first before "connect by". Thanks. -- View this message in context: http://lucene.472066.n3.nabble.com/Solr-sort-param-behavior-clarification-tp3709248p3709248.html Sent from the Solr - User mailing list archive at Nabble.com.
