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https://issues.apache.org/jira/browse/SOLR-11437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16820783#comment-16820783
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Uwe Schindler commented on SOLR-11437:
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This should also be applied for {{field:*}} queries.
> double open ended range queries should be optimized to
> DocValuesFieldExistsQuery or NormsFieldExistsQuery
> ---------------------------------------------------------------------------------------------------------
>
> Key: SOLR-11437
> URL: https://issues.apache.org/jira/browse/SOLR-11437
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Hoss Man
> Priority: Major
>
> DocValuesFieldExistsQuery & NormsFieldExistsQuery are efficient ways to
> determine if a doc has a value in a given field (assuming the field has
> docValues or norms respectively)
> Since Solr's schema knows if/when these properties are true for a given
> field, we should be able to optimize some of the {{field:[* TO *]}} usecases
> to use these queries under the covers -- notably in
> {{FieldType.getRangeQuery}} and subclasses that override it, but there may be
> other cases where they could come in handy as well
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