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https://issues.apache.org/jira/browse/OPENJPA-1288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12753819#action_12753819
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Pinaki Poddar commented on OPENJPA-1288:
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After discussion in JPA 2.0 expert group, we reached the consensus that alias()
be a mutation on the same instance rather than creating a new instance.
But an aliased expression can not be aliased again.
> Support alias() on Criteria Query API
> -------------------------------------
>
> Key: OPENJPA-1288
> URL: https://issues.apache.org/jira/browse/OPENJPA-1288
> Project: OpenJPA
> Issue Type: New Feature
> Components: jpa, query
> Affects Versions: 2.0.0-M3, 2.0.0-M4, 2.0.0
> Reporter: Pinaki Poddar
> Assignee: Pinaki Poddar
> Fix For: 2.0.0-M3, 2.0.0-M4, 2.0.0
>
>
> Selection.alias() according to latest JPA 2.0 creates new instances rather
> than adding an alias name to the receiver.
> This apparently simple change can have a relatively large impact, because we
> maintain Selection terms keyed by its alias.
> If we go for a delegation pattern to implement alias(), then all Selection
> derivations (quite a few of them) are to be delegated.
> Comments/thoughts?
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