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https://issues.apache.org/jira/browse/OPENJPA-491?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Patrick Linskey resolved OPENJPA-491.
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Resolution: Fixed
> JPQL extension: scalar functions in GROUP BY
> --------------------------------------------
>
> Key: OPENJPA-491
> URL: https://issues.apache.org/jira/browse/OPENJPA-491
> Project: OpenJPA
> Issue Type: New Feature
> Affects Versions: 0.9.0, 0.9.6, 0.9.7, 1.0.0, 1.0.1
> Reporter: Patrick Linskey
> Fix For: 1.1.0
>
>
> JPQL does not allow scalar functions to be used in GROUP BY clauses. This can
> be useful. Example:
> select substring(o.stringField, 1, 1), count(o) from AllFieldTypes o
> group by substring(o.stringField, 1, 1)
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