Github user kaspersorensen commented on the pull request:
https://github.com/apache/metamodel/pull/20#issuecomment-98801556
The right item way is also possible because anyone can build such a query
programmatically. In our use of MetaModel we mostly do that and don't use the
parser. A bit cumbersome, but allows different components to influence the
query plan that we have as a kind application of the visitor pattern.
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