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Re: Query kernel
On Sun, 08 Apr 2001, Dasarathi wrote:
> hi falko,
> some questions regarding querying
> suppose u have a database containing 2 classes/tables
>
> Employee , Department.
>
> and we have queries on thesse.
>
> there r 2 ways to handle queries
> first the usual relational way
> get all objects of class Employee and of Department
> and then go abt the dirty work
>
> or
> see if there is a pointer in Employee object to
> a department object and use that data.(ambiguous since no relation)
>
> since ozone does not adhere to ODL(definition)
> how does one define relations between objects
> this is important in querying .
You don't need to explicitly define relations. There is no other
type/relations/whatever definition than the Java code in ozone.
>
> right now we are implementing 'select from'
> query of OQL.Parsing is over.Code generation
> is becoming tricky with all the problems i mentioned
> above
You can find out about the object structure via reflection.
Falko
--
______________________________________________________________________
Falko Braeutigam mailto:falko@smb-tec.com
SMB GmbH http://www.smb-tec.com