Horton

Re: query slowness caused by table alias

Peter Eisentraut <e99re41@docs.uu.se>

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From: Peter Eisentraut <e99re41@DoCS.UU.SE>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Chi Fan <chifungfan@yahoo.com>, bugs@postgresql.org
Date: 2000-05-05T09:41:19Z
Lists: pgsql-bugs 
On Thu, 4 May 2000, Tom Lane wrote:

> > EXPLAIN 
> > SELECT * 
> > FROM part p              -- let p alias to part
> > WHERE part.part_id = 42; -- but don't use p
> 
> > Nested Loop  (cost=0.00..2429.30 rows=50735 width=219)
> >   -> Index Scan using part_pkey on part (cost=0.00..3.60 rows=1 width=4)
> >   -> Seq Scan on part p  (cost=0.00..1918.35 rows=50735 width=215)
> 
> This is correct behavior.

Isn't it time we disable this by default or at least provide an option for
it? It seems this comes up every week.

-- 
Peter Eisentraut                  Sernanders väg 10:115
peter_e@gmx.net                   75262 Uppsala
http://yi.org/peter-e/            Sweden