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
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