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https://issues.apache.org/jira/browse/SOLR-3897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13468571#comment-13468571
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Erik Hatcher commented on SOLR-3897:
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bq. Seems like for preserveMulti=true, one should get all field values
regardless of the setting of snippets. Should the number of snippets per field
value be capped at 1 when preserveMulti==true, or should we consider snippets
to be per value rather than per field?
I think each field value, when preserveMulti=true, should be considered
separately and all highlighting parameters for that field should apply to each
field value. Number of fragments, for example, should be per field value
instance. And I suppose this necessitates another array level in the response?
Sorry if this got a fair bit more complicated than it started. After pondering
this after the original patch was committed, I realized there'd be some
confusion between field values and fragments.
> Preserve multi-value fields during hit highlighting
> ---------------------------------------------------
>
> Key: SOLR-3897
> URL: https://issues.apache.org/jira/browse/SOLR-3897
> Project: Solr
> Issue Type: Improvement
> Components: highlighter
> Reporter: Joel Bernstein
> Assignee: Yonik Seeley
> Priority: Minor
> Fix For: 4.1
>
> Attachments: SOLR-3897.patch, SOLR-3897.patch
>
>
> The behavior of the default Solr hit highlighter on multi-value fields is to
> only return the values that have a hit and sort them by score.
> This ticket supplies a patch that adds a new highlight parameter called
> "preserveMulti" which can be used on a feild by field basis to return all of
> the values in their original order. If this parameter is used, the values
> that have a hit are highlighted and the ones that do not contain a hit are
> returned un-highlighted.
> The "preserveMulti" parameter works with the default standard highlighter and
> follows the standard highlighting conventions.
> Sample usage for a field called "cat":
> f.cat.hl.preserveMulti=true
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