On 8/9/07, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
>
>
> Yeah, we could simply insist on no change to any column that's used by
> any of the expressions. That would be cheap to test.
>
>
>
I am trying to figure out the best way to extract this information. Is there
any
existing code to get all attributes used in the expressions ? Or do I need
to walk the tree and extract that information ?
Thanks,
Pavan
Pavan Deolasee
EnterpriseDB http://www.enterprisedb.com