| From: | "Vadim B(dot) Mikheev" <vadim(at)sable(dot)krasnoyarsk(dot)su> |
|---|---|
| To: | Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>, PostgreSQL-development <hackers(at)postgreSQL(dot)org> |
| Subject: | Re: [HACKERS] subselects |
| Date: | 1998-01-10 17:58:52 |
| Message-ID: | 34B7B6DC.937E1B8D@sable.krasnoyarsk.su |
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| Thread: | |
| Lists: | pgsql-hackers |
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
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