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https://issues.apache.org/jira/browse/OAK-322?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13459537#comment-13459537
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Alex Parvulescu commented on OAK-322:
-------------------------------------
> Do we need to support those queries even if we don't support same name
> siblings?
Supporting same name siblings is not the issue here - I think this is a xpath
to sql2 transformation error: "where 0 is not null".
At the very least, the error message should be more obvious.
> XPath descendant index - sql2 transformation error
> --------------------------------------------------
>
> Key: OAK-322
> URL: https://issues.apache.org/jira/browse/OAK-322
> Project: Jackrabbit Oak
> Issue Type: Sub-task
> Components: jcr
> Reporter: Alex Parvulescu
>
> Test class XPathAxisTest: tests #testIndex0Descendant to
> #testIndex3Descendant.
> The used xpath query is
> {noformat}
> /jcr:root/testroot//*[0]
> {noformat}
> which apparently gets transformed into a bad SQL2 query, that yields the
> following error at execute time:
> {noformat}
> Caused by: java.text.ParseException: Query: select [jcr:path], [jcr:score], *
> from [nt:base] as a where 0(*)is not null and isdescendantnode(a,
> '/testroot'); expected: NOT, (
> {noformat}
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