Thanks for the info both of you. Of course Lucene obeys Murphy's law that the missing ones appear first when you reverse sort, which is what Murphy's law says you want to do.
Does solr have a custom build of Lucene in it, or is the functionality required to required to get the missing ones to the end of the list something that can be configured anyhow in Lucene? -----Original Message----- From: Yonik Seeley [mailto:[EMAIL PROTECTED] Sent: 11 July 2006 15:37 To: java-user@lucene.apache.org Subject: Re: Missing fields used for a sort On 7/11/06, Erick Erickson <[EMAIL PROTECTED]> wrote: > So I guess all the documents without a particular field all get defaulted > for you. Which end of the list they get placed at I guess you'll find out > <G>... For lucene, it depends on what direction you are sorting. Solr gives control over this in it's schema... here are some snippets from the example schema.xml: <!-- The optional sortMissingLast and sortMissingFirst attributes are currently supported on types that are sorted internally as a strings. - If sortMissingLast="true" then a sort on this field will cause documents without the field to come after documents with the field, regardless of the requested sort order (asc or desc). - If sortMissingFirst="true" then a sort on this field will cause documents without the field to come before documents with the field, regardless of the requested sort order. - If sortMissingLast="false" and sortMissingFirst="false" (the default), then default lucene sorting will be used which places docs without the field first in an ascending sort and last in a descending sort. --> <!-- Numeric field types that manipulate the value into a string value that isn't human readable in it's internal form, but with a lexicographic ordering the same as the numeric ordering so that range queries correctly work. --> <fieldtype name="sint" class="solr.SortableIntField" sortMissingLast="true"/> <fieldtype name="slong" class="solr.SortableLongField" sortMissingLast="true"/> <fieldtype name="sfloat" class="solr.SortableFloatField" sortMissingLast="true"/> <fieldtype name="sdouble" class="solr.SortableDoubleField" sortMissingLast="true"/> -Yonik http://incubator.apache.org/solr Solr, the open-source Lucene search server --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
