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https://issues.apache.org/jira/browse/SOLR-16217?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Christine Poerschke resolved SOLR-16217.
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Fix Version/s: 9.1
main (10.0)
Resolution: Fixed
> SortingMergePolicy: test coverage for dual-field sort
> -----------------------------------------------------
>
> Key: SOLR-16217
> URL: https://issues.apache.org/jira/browse/SOLR-16217
> Project: Solr
> Issue Type: Test
> Reporter: Christine Poerschke
> Assignee: Christine Poerschke
> Priority: Minor
> Fix For: 9.1, main (10.0)
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> SOLR-5730 previously made Lucene's {{SortingMergePolicy}} configurable in
> Solr.
> The sort criteria could be (say) {{timestamp_i_dvo desc}} or (say)
> {{timestamp_i_dvo desc, id desc}} with the latter using the unique document
> key to ensure deterministic sorting.
> See e.g.
> [https://github.com/apache/solr/blob/releases/solr/9.0.0/solr/core/src/java/org/apache/solr/search/SolrIndexSearcher.java#L193]
> and
> [https://github.com/apache/solr/blob/releases/solr/9.0.0/solr/core/src/java/org/apache/solr/search/EarlyTerminatingSortingCollector.java#L55-L67]
> w.r.t. {{segmentTerminateEarly}} logic detail i.e. single-field
> {{sort=timestamp_i_dvo desc}} could be used if the merge policy has
> dual-field {{timestamp_i_dvo desc, id desc}} but dual-field sort requires
> dual-field merge policy.
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