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From "Andrey Razumovsky (JIRA)" <>
Subject [jira] Created: (CAY-1105) Expressions in-memory automatic type convertion
Date Wed, 10 Sep 2008 13:14:11 GMT
Expressions in-memory automatic type convertion

                 Key: CAY-1105
             Project: Cayenne
          Issue Type: Improvement
          Components: Cayenne Core Library
    Affects Versions: 3.0
            Reporter: Andrey Razumovsky
            Assignee: Andrus Adamchik
         Attachments: patch-test-Expr.txt

The root of the problem is difference in behavior of expressions on server (using queries)
and in-memory (using Expression.match(...). All DBMS I know support automatic type convertion,
i.e. if I write 
SELECT * FROM a WHERE intProperty='1'
everything will go OK.

So, if I write an expression like [note quotes at 1!]
ExpressionFactory.greaterExp("intProperty", "1")

it will go normally with a query, but will result in an exception if I try to invoke match(...).
I suggest to make the behavior similiar and therefore implement automatic type convertion
on expressions. I've submitted a patch with a number of tests, which all fail. I think the
must all succeed.

Comments and other expression improvement suggestions are welcomed

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