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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3897) Preserve multi-value fields during hit highlighting
Date Wed, 03 Oct 2012 13:00:08 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13468540#comment-13468540
] 

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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