Обсуждение: Outer Joins, Foreign keys, subselects

Hi,

I know I'm stealing your time, but ...

is there work being done already on the above mentioned features?

Is there an immediate need for help?

Regards,

-- 
Jens Glaser     Am Holderstrauch 13, 36041 Fulda, 0661/9429507    jens@jens.de

> Hi,
> 
> I know I'm stealing your time, but ...
> 
> is there work being done already on the above mentioned features?
> 
> Is there an immediate need for help?
> 

We have subselects, and plan to add outer joins and foreign keys in 6.6.
Our TODO list is on our web site.
--  Bruce Momjian                        |  http://www.op.net/~candle maillist@candle.pha.pa.us            |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026
 

Hi,

On Tue, 27 Jul 1999, Bruce Momjian wrote:
> We have subselects, and plan to add outer joins and foreign keys in 6.6.

well, but AFAIK not of the form e.g.
 select blabla from (select * from asdasd ..) t1,                    (select * from bsdfsd ..) t2, where
t1.pkey=t2.pkey..
 

(subselects in the target list). SCR!

Regards,

-- 
Jens Glaser     Am Holderstrauch 13, 36041 Fulda, 0661/9429507    jens@jens.de

Jens Glaser <jens@helena.jens.de> writes:
>> We have subselects, and plan to add outer joins and foreign keys in 6.6.

> well, but AFAIK not of the form e.g.

>   select blabla from (select * from asdasd ..) t1,
>                      (select * from bsdfsd ..) t2, where t1.pkey=t2.pkey
>   ..

> (subselects in the target list). SCR!

Actually, Jan is saying that that's exactly what he needs to make rules
work Really Right.  If we add subselect RTEs for the rule rewriter,
I see no reason that we couldn't provide them for direct use too.

Might not happen for 6.6, but maybe the version after.
        regards, tom lane