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https://issues.apache.org/jira/browse/SOLR-3897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13468540#comment-13468540
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Yonik Seeley commented on SOLR-3897:
------------------------------------
Erik asked the question "suppose a multiValued field has two values, both get
highlighted with multiple snippets"...
I had assumed that one would not request multiple snippets when using
preserveMulti (or that one would use hl.fragsize=0 to get complete field
values).
But I just checked the test and it requires snippets=2 to get both field values.
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?
> 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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