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https://issues.apache.org/jira/browse/OAK-8934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17050303#comment-17050303
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Amrit Verma edited comment on OAK-8934 at 3/3/20 3:21 PM:
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Please review the PR - [https://github.com/apache/jackrabbit-oak/pull/193/files]

Some of the tests are failing, I have mentioned that in a comment in the PR.


was (Author: amrverma):
Please review the PR - [https://github.com/apache/jackrabbit-oak/pull/193/files]

> Indexing: filter entries with a regular expression
> --------------------------------------------------
>
>                 Key: OAK-8934
>                 URL: https://issues.apache.org/jira/browse/OAK-8934
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: indexing
>            Reporter: Thomas Mueller
>            Assignee: Thomas Mueller
>            Priority: Major
>              Labels: amrit
>
> We should provide a way to filter the index using a regular expression. For 
> example, only index nodes that contain a reference to another node. (Not a 
> JCR reference, but a reference within the value itself). For example, index a 
> node if one of the properties contains:
> * /content/abc
> * <html...> <a href="/content/abc">
> * and so on
> This will allow to run a query to find if /content/abc is referenced. The 
> index and the query will probably need to use a tag, and the cost of the 
> index needs to be high. Otherwise the query engine can't know when this index 
> should be used.



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