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https://issues.apache.org/jira/browse/OAK-1229?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Mueller resolved OAK-1229.
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Resolution: Fixed
Revision 1546022
> XPath queries of the form [@x=1 or @x=2] should not use union
> -------------------------------------------------------------
>
> Key: OAK-1229
> URL: https://issues.apache.org/jira/browse/OAK-1229
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: query
> Reporter: Thomas Mueller
> Assignee: Thomas Mueller
>
> In OAK-882, conditions of the form "x=1 or x=2" are automatically converted
> to "x in(1, 2)", and an index is used.
> In OAK-1116, xpath queries of the form "... or ..." are automatically
> converted to union, to allow using an index.
> As [~alex.parvulescu] found out, because of OAK-1116, XPath queries with
> "@x=1 or @x=2" are now converted to union, even thought it would be better if
> they are converted to "x in(1, 2)", so no union is used.
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