Re: [HACKERS] subselects

From: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
To: vadim(at)sable(dot)krasnoyarsk(dot)su (Vadim B(dot) Mikheev)
Cc: hackers(at)postgreSQL(dot)org
Subject: Re: [HACKERS] subselects
Date: 1998-01-11 05:23:29
Message-ID: 199801110523.AAA11411@candle.pha.pa.us
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>
> 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
>

OK.

--
Bruce Momjian
maillist(at)candle(dot)pha(dot)pa(dot)us

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