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From "Alexander Klimetschek (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OAK-1067) XPath query fails on negated boolean properties
Date Thu, 03 Oct 2013 19:58:42 GMT

    [ https://issues.apache.org/jira/browse/OAK-1067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13785486#comment-13785486
] 

Alexander Klimetschek commented on OAK-1067:
--------------------------------------------

Right, {{not(@prop)}} is meant to select non existent properties. It has no special meaning
on boolean properties.

The query {{@prop='false' and not(@prop)}} is what you need when an application uses boolean
properties and expects a missing boolean property to have the same meaning as "false".

> XPath query fails on negated boolean properties 
> ------------------------------------------------
>
>                 Key: OAK-1067
>                 URL: https://issues.apache.org/jira/browse/OAK-1067
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: core, query
>            Reporter: Alex Parvulescu
>            Assignee: Thomas Mueller
>         Attachments: OAK-1067-test.patch
>
>
> The issue can be seen when running an xpath query for nodes that have a boolean property
set to false:
> bq. //*[(child/@prop = 'false' or not(child/@prop))]
> this translates into 
> bq. select [jcr:path], [jcr:score], * from [nt:base] as a where [child/prop] = false
or [child/prop] is null
> the second _or_ part is wrong and selects more than it should: 'or [child/prop] is null'



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