On Monday, Sep 29, 2003, at 18:54 Europe/Rome, Andrus Adamchik wrote:
>
> On Monday, September 29, 2003, at 09:02 AM, Giulio Cesare Solaroli
> wrote:
>
>> It's true that the dual table exists only on Oracle (by default), but
>> it is also a really simple table to create from scratch: one table,
>> one column, one raw. The real problem could be the lack of the
>> "exists" operator and the correct handling of subqueries.
>>
>> The problem is that I though I could create subclasses of Expression;
>> but Cayenne seems to take a different approach, using the
>> ExpressionFactory class.
>
> Never mind ExpressionFactory. This is just a helper class. You can
> still subclass an Expression... Now given my previous message, do you
> need to? Expression by itself doesn't build SQL.
> QueryTranslator/QualifierTranslator does.
Ok. I'll try to give it a look and let you know.
Thanks for your attention.
Giulio Cesare
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