[teiid-issues] [JBoss JIRA] (TEIID-3253) Expand allowed order by expressions

[Steven Hawkins (JIRA)]

Steven Hawkins created TEIID-3253:
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             Summary: Expand allowed order by expressions
                 Key: TEIID-3253
                 URL: https://issues.jboss.org/browse/TEIID-3253
             Project: Teiid
          Issue Type: Enhancement
            Reporter: Steven Hawkins


with a non-simple query we won't allow derived expressions in the order by such as:

select max(x), y from t group by y order by case when y is null then 0 else y end

We treat this ordering as unrelated - however it is expressed in terms of expressions from the select clause.  Mondrian will generate queries of this form, which requires a workaround of modifying the dialect to use ansi null ordering.



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