Bruce Momjian wrote:
>
> OK, a few questions:
>
> Should we use sortmerge, so we can use our psort as temp tables,
> or do we use hashunique?
>
> How do we pass the query to the optimizer? How do we represent
> the range table for each, and the links between them in correlated
> subqueries?
My suggestion is just use varlevel in Var and don't put upper query'
relations into subquery range table.
Vadim