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From "Joel Bernstein (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3897) Preserve multi-value fields during hit highlighting
Date Wed, 03 Oct 2012 14:38:08 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13468587#comment-13468587
] 

Joel Bernstein commented on SOLR-3897:
--------------------------------------

fragsize works only with the FastVectorHighlighter so if we want to ensure one fragment per
field value then we will have to work with the fragmenter. The default fragmenter works in
chunks of 100 characters.

At this point I'm thinking it might be best to leave it as it is. The user will have to set
the snippets count but this can be documented. Each field value will be a single fragment
unless the it has more then 100 characters and if this an issue then a new fragmenter can
be provided.
                
> 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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