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https://issues.apache.org/jira/browse/SOLR-741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13693088#comment-13693088
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Upayavira commented on SOLR-741:
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Another approach to the same issue:
https://issues.apache.org/jira/browse/SOLR-4772
That is, using an UpdateProcessor.
> Add support for rounding dates in DateField
> -------------------------------------------
>
> Key: SOLR-741
> URL: https://issues.apache.org/jira/browse/SOLR-741
> Project: Solr
> Issue Type: Improvement
> Components: search
> Affects Versions: 1.4
> Reporter: Shalin Shekhar Mangar
> Priority: Minor
> Fix For: 4.4
>
>
> As discussed at http://www.nabble.com/Rounding-date-fields-td19203108.html
> Since rounding dates to a coarse value is an often recommended solution to
> decrease number of unique terms, we should add support for doing this in
> DateField itself. A number of syntax were proposed, some of them were:
> # <fieldType name="date" class="solr.DateField"
> sortMissingLast="true"omitNorms="true" roundTo="-1MINUTE" /> (Shalin)
> # <fieldType name="date" class="solr.DateField" sortMissingLast="true"
> omitNorms="true" round="DOWN_MINUTE" /> (Otis)
> Hoss proposed more general enhancements related to arbitary pre-processing of
> values prior to indexing/storing using pre-processing analyzers.
> This issue aims to build a consensus on the solution to pursue and to
> implement that solution inside Solr.
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