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https://issues.apache.org/jira/browse/LUCENE-4715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13565570#comment-13565570
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Gilad Barkai commented on LUCENE-4715:
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How can a mess be avoided when allowing different OrdinalPolicies in the same
CLP ?
There would be ordinals which has the parents, and ordinals that dont? How can
the collector or aggregator know which ordinals should be delt with as without
parents and which should not?
> Add OrdinalPolicy.ALL_BUT_DIMENSION
> -----------------------------------
>
> Key: LUCENE-4715
> URL: https://issues.apache.org/jira/browse/LUCENE-4715
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/facet
> Reporter: Shai Erera
> Assignee: Shai Erera
> Attachments: LUCENE-4715.patch
>
>
> With the move of OrdinalPolicy to CategoryListParams,
> NonTopLevelOrdinalPolicy was nuked. It might be good to restore it, as
> another enum value of OrdinalPolicy.
> It's the same like ALL_PARENTS, only doesn't add the dimension ordinal, which
> could save space as well as computation time. It's good for when you don't
> care about the count of Date/, but only about its children counts.
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