Re: Help - Design metadata layer for dynamic joins

AK wrote:

> I need to do create a query dynamically, based on a variable number of
> fields selected by a user.
> - A user can select from a list of hundreds of fields. The fields are
> from various related tables in one Oracle schema.
> - I have to design and build a way to create a query on-the-fly that
> returns the selected fields.
> - To avoid running a query for all the columns if only a subset of
> 1000 columns is selected, the query needs to be built with only those
> tables and joins required for the columns selected. So naturally, this
> involves creating a metadata layer with join information that will
> help create this query on-the-fly.
>
> Are there any standard design patterns for designing and building such
> a metadata layer?
>
> Any examples, tips or reference articles would be appreciated.

look http:\\nickyb.interfree.it Received on Thu Nov 04 2004 - 11:49:30 CST