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https://issues.apache.org/jira/browse/SOLR-2134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12915792#action_12915792
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Uwe Schindler commented on SOLR-2134:
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I have not closely looked into it (because the Solr sorting stuff is out of my
scope), but I have one comment about floats and doubles:
The problem with the approach of setting infinity as replacement value is, that
NaN values are still undefined and may be ordered before/after these infinity
values. But I think the problem is minor.
The same problem applies if you have infinity itsself or for long/double
min/max values as field value, then the sorting is also undefined (the not set
values should go after/before all real infinities).
> 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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