Thread

Re: [HACKERS] subselects

Vadim B. Mikheev <vadim@sable.krasnoyarsk.su> — 1998-01-10T17:58:52Z

Vadim B. Mikheev wrote:
> 
> 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.

Hmm... Sorry, it seems that I did reply to very old message - forget it.

Vadim