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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-2134) Trie* fields should support sortMissingLast=true, and deprecate Sortable* Field Types
Date Tue, 28 Sep 2010 16:30:33 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12915816#action_12915816
] 

Uwe Schindler commented on SOLR-2134:
-------------------------------------

I don't expect adding/subtracting anything to infinity changes its value (at least the IEEE-754
specs say it should not change anything). NaN order is not undefined but behaves different
than you expect (it means if you ever compare NaN with anything using <, >, == it will
return always false). This will mix up the sorting, so defining it as missingValue is maybe
a good idea. But as said before, you cannot compare with NaN, it will always return false,
so use Double.isNan(cached.values[doc]) :-)

> Trie* fields should support sortMissingLast=true, and deprecate Sortable* Field Types
> -------------------------------------------------------------------------------------
>
>                 Key: SOLR-2134
>                 URL: https://issues.apache.org/jira/browse/SOLR-2134
>             Project: Solr
>          Issue Type: Improvement
>          Components: Schema and Analysis
>            Reporter: Ryan McKinley
>         Attachments: SOLR-2134-SortMissingLast.patch, SOLR-2134-SortMissingLast.patch,
SOLR-2134-SortMissingLast.patch, SOLR-2134-SortMissingLast.patch
>
>
> With the changes in LUCENE-2649, the FieldCache also returns if the bit is valid or not.
 This is enough to support sortMissingLast=true with Trie* fields.  Then we can get rid of
the Sortable* fields

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