Re: column aliases

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От Bruce Momjian
Тема Re: column aliases
Дата
Msg-id 200006080305.XAA10160@candle.pha.pa.us
обсуждение исходный текст
Ответ на Re: [HACKERS] column aliases  (Zeugswetter Andreas SB <ZeugswetterA@wien.spardat.at>)
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[ Charset ISO-8859-1 unsupported, converting... ]
> 
> > >What it looks like to me is that we have a bug in the 
> > expansion of '*'.
> > >It should be generating columns for both the explicit and 
> > the implicit
> > >FROM clause, but it's evidently deciding that it should only produce
> > >output columns for the first one.
> > 
> > Yes, since it is joining the two tables it should be returning all
> > columns of the join.
> > 
> > >This may go a long way towards explaining why people have been so
> > >readily confused by the implicit-FROM-clause business! 
> > 
> > It *is* confusing, that's for sure!
> 
> IMHO, if there exists a from clause, we could insist,
> that all tables are listed (no implicitly added table),
> since it is really too error prone.

Seems this is exactly what I implemented.


> 
> What I would not like to see removed is the ability to 
> avoid the from clause alltogether. Like in:
> 
> select xor.eval;
> 
> Andreas
> 
> ************
> 


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