Hi Sean, thank you for the clarification. In our scenario a user might have many orders so it would be nice to be able to page through the result set in descending order. Since our OrderNumbers are guaranteed to be unique we are currently using them as the keys in Riak. They numbers are also created sequentially, hence the desire to page through them in descending order giving the user a chronological perspective of placed orders.
We're still quite early in the process of evaluating Riak for our project so we have plenty of time to try other approaches. /F ________________________________ From: Sean Cribbs [[email protected]] Sent: Monday, September 12, 2011 3:53 PM To: Fredrik Lindström Cc: [email protected] Subject: Re: riaksearch 0.14.2 via solr: sort desc Fredrik, Unfortunately, because of limitations in Riak Search 0.14.x, it can only (pre-)sort reliably on the document ID. However, it seems like OrderNumber might be a natural ID for this document? If so, you could do something like the following: http://riak/solr/order/select?rows=1&presort=key&q=Order_Contact_Email:[email protected]<mailto:order_contact_email%[email protected]> However, this query will also return in ascending order. If you just want the highest order number, then feeding this query to MapReduce and processing it there would seem appropriate. 2011/9/12 Fredrik Lindström <[email protected]<mailto:[email protected]>> Hi everyone, does the "sort=myfieldname desc" parameter in riaksearch 0.14.2 (via solr) only sort within the current result set dictated by rows=x and start =y? I can get my search results in the correct ASC order regardless of the rows and start parameters. Sorting in DESC with rows=1 and start=0 I get one (obviously) result but the result actually appears to be in ASC order. The doc returned in the search result is the one with the lowest integer value in the field used for sorting. I'm quite new to Riak and Riak Search and therefore I assume that the error is on my part. Some technical details: Total objects in "order" bucket: 187 Query with DESC sort: http://riak/solr/order/select?rows=1&start=0&sort=Order_OrderNumber%20desc&q=Order_Contact_Email:[email protected] Result: 1 doc with Order_OrderNumber = 362982 (Expected result in my world of fantasy would be 621738 which is currently the highest value) Query with ASC sort: http://riak/solr/order/select?rows=1&start=0&sort=Order_OrderNumber%20asc&q=Order_Contact_Email:[email protected]<http://riak/solr/order/select?rows=1&start=0&sort=Order_OrderNumber%20desc&q=Order_Contact_Email:[email protected]> Result: 1 doc with Order_OrderNumber = 362982 I have a custom schema where I have defined the field I want to sort by in the following way: {field, [ {name, "Order_OrderNumber"}, {type, integer}, {analyzer_factory, {erlang, text_analyzers, integer_analyzer_factory}} ]}, If I run the DESC query with rows=187 the results are ordered in the correct descending order. /F _______________________________________________ riak-users mailing list [email protected]<mailto:[email protected]> http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com -- Sean Cribbs <[email protected]<mailto:[email protected]>> Developer Advocate Basho Technologies, Inc. http://www.basho.com/
_______________________________________________ riak-users mailing list [email protected] http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
