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https://issues.apache.org/jira/browse/SLING-2940?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Mueller updated SLING-2940:
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Attachment: SLING-2940.patch
Proposed patch
> JCR queries for jcr:language: avoid using fn:lower-case
> -------------------------------------------------------
>
> Key: SLING-2940
> URL: https://issues.apache.org/jira/browse/SLING-2940
> Project: Sling
> Issue Type: Improvement
> Components: Extensions
> Reporter: Thomas Mueller
> Attachments: SLING-2940.patch
>
>
> In SLING-2121, the query was changed to support both lowercase and uppercase
> country codes in locales, for example "en_GB" and "en_gb". To do that,
> fn:lower-case(jcr:language) = 'en_gb' is currently used. While it works, the
> usage of fn:lower-case is problematic for the query engine in Jackrabbit and
> specially Oak, because it is quite hard to use an index in this case.
> To improve performance of this query with Oak, I suggest to use the longer
> form with "or": jcr:language = 'en_gb' or jcr:language = 'en_GB'. In this
> case, Jackrabbit / Oak can use an index. See also OAK-882 for index usage for
> "or" conditions.
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