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https://issues.apache.org/jira/browse/SOLR-1023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13150506#comment-13150506
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Ryan McKinley commented on SOLR-1023:
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thanks Gunnlaugur and Simon!
> StatsComponent should support dates (and other non-numeric fields)
> ------------------------------------------------------------------
>
> Key: SOLR-1023
> URL: https://issues.apache.org/jira/browse/SOLR-1023
> Project: Solr
> Issue Type: New Feature
> Affects Versions: 1.4
> Environment: Mac OS 10.5, java version "1.5.0_16"
> Reporter: Peter Wolanin
> Assignee: Ryan McKinley
> Fix For: 3.5, 4.0
>
> Attachments: SOLR-1023-CHANGES.TXT.branch_3x.patch,
> SOLR-1023-CHANGES.TXT.branch_3x.patch, SOLR-1023-CHANGES.TXT.trunk.patch,
> SOLR-1023-against-branch_3x.svn.patch, SOLR-1023-against-branch_3x.svn.patch,
> SOLR-1023-against-lucene_3_4_0.patch, SOLR-1023.patch, SOLR-1023.patch,
> SOLR-1023.patch, SOLR-1023.patch,
> stats-component-path-nightly-2009-10-08.patch
>
>
> Currently, the StatsComponent only supports single-value numeric fields:
> http://wiki.apache.org/solr/StatsComponent
> trying to use it with a date field I get an exception like:
> java.lang.NumberFormatException: For input string: "2009-01-27T20:04:04Z"
> trying to use it with a string I get an error 400 "Stats are valid for
> single valued numeric values."
> For constructing date facets it would be very useful to be able to get the
> minimum and maximum date from a DateField within a set of documents. In
> general, it could be useful to get the minimum and maximum from any field
> type that can be compared, though that's of less importance.
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