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From "Yonik Seeley" <yo...@apache.org>
Subject Re: Alpha numeric sort problem
Date Fri, 15 Feb 2008 18:19:48 GMT
On Fri, Feb 15, 2008 at 3:36 AM, Mahesh Udupa <mahesh.udupa@gmail.com> wrote:
> Thanks Yonik,
>
>  It works fine. But sort is *case sensitive. *
>  And also,
>  If my String contains some white space(or - or any other special char) then
>  failed to sort, with following error.
>
>  INFO: /select/ version=2.2&rows=20&fl=rcid,status,categoryid,cmprice_value,cmprice_model,cmprice_noofdays,cmprice_nooftimes,cmprice_freqocc,cmprice_startdate,cmprice_enddate,title,devname,category,cmprice,shortdesc,ctype,score&start=0&q=%2Bstatus:published+%2Bplanid:1;title+asc
>  0 4
>  Feb 15, 2008 1:40:47 PM org.apache.solr.core.SolrException log
>  SEVERE: java.lang.RuntimeException: there are more terms than documents in
>  field "title", but it's impossible to sort on tokenized fields
>
>  I have used title as follows
>  <copyField source="title" dest="title_exact"/>
>  <field name="title_exact" type="string" indexed="true" stored="true"/>
>
>  So how can I make sure that sort is case in-sensitive, works for special
>  chars and numeric fields?

Make a custom fieldType, starting with the TextField type and
specifying the analyzer to use a keyword tokenizer followed by a
lowercase filter.  The do the copyField (as you have done above).
Then actually sort by the title_exact field (your example query shows
you still sorting by "title").

You probably want to use a separate sort parameter:  sort=text_exact desc

-Yonik

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