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https://issues.apache.org/jira/browse/OAK-2530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14325842#comment-14325842
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Thomas Mueller commented on OAK-2530:
-------------------------------------
The change in EquiJoinConditionImpl is needed, otherwise
org.apache.jackrabbit.core.query.JoinTest fails. The original code was wrong,
but this was not detected as there was no distinction between "is null" and "is
not null" there.
> Support IS NULL based property restrictions in the query engine
> ---------------------------------------------------------------
>
> Key: OAK-2530
> URL: https://issues.apache.org/jira/browse/OAK-2530
> Project: Jackrabbit Oak
> Issue Type: New Feature
> Components: query
> Reporter: Thomas Mueller
> Assignee: Thomas Mueller
> Attachments: OAK-2530.patch
>
>
> Currently queries involving IS NULL should be supported by the query engine,
> so that an index implementation can provide an optimization for it (possibly
> similar to a function based index).
> See OAK-2517 for details
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