[jira] Created: (OPENJPA-101) enhance JPQL Constructor Expressions implementation

["wanyna (JIRA)" <ji...@apache.org>]

enhance JPQL Constructor Expressions implementation
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                 Key: OPENJPA-101
                 URL: https://issues.apache.org/jira/browse/OPENJPA-101
             Project: OpenJPA
          Issue Type: Improvement
          Components: query
            Reporter: wanyna


There are two tables A and B, I need to execute sql like
"insert into A select ... from B".
I use JPQL Constructor Expressions,
select new A(...) from B, got A list then persist.
But some fields of A depends on program context, not direct from B, so SELECT NEW clause should look like these :
select new A(B.column1, 'xxx') from B, or
select new A(null, B.column2) from B, or
select new A(variable, B.column2) from B.

Unfortunately, OpenJPA doesn't support this.
I have to get the result object[] list and constuct A in my code now. 

If JPQL Constructor Expressions become more powerful, my code  will be more simple then. 

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