[jira] [Updated] (OAK-4368) Excerpt extraction from the Lucene index should be more selective

["Tommaso Teofili (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OAK-4368?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tommaso Teofili updated OAK-4368:
---------------------------------
    Summary: Excerpt extraction from the Lucene index should be more selective  (was: Excerpt extracted from the Lucene index should be more selective)

> Excerpt extraction from the Lucene index should be more selective
> -----------------------------------------------------------------
>
>                 Key: OAK-4368
>                 URL: https://issues.apache.org/jira/browse/OAK-4368
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: lucene
>    Affects Versions: 1.0.30, 1.2.14, 1.4.2, 1.5.2
>            Reporter: Tommaso Teofili
>            Assignee: Tommaso Teofili
>             Fix For: 1.5.3
>
>         Attachments: OAK-4368.0.patch
>
>
> Lucene index can be used in order to extract _rep:excerpt_ using {{Highlighter}}.
> The current implementation may suffer performance issues when the result set of the original query contains a lot of results, each of them possibly containing lots of (stored) properties that get passed to the highlighter in order to try to extract the excerpt; such a process doesn't stop as soon as the first excerpt is found so that excerpt is composed using text from all stored properties in all results (if there's a match on the query).
> While we can accept some cost of extracting excerpt at query time (whereas it was generated at excerpt retrieval time before OAK-3580, e.g. via _row.getValue("rep:excerpt")_) , that should be bounded and mitigated as much as possible.



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