Re: Request for qualified column names

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От Larry Rosenman
Тема Re: Request for qualified column names
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Msg-id 221900000.1043700659@lerlaptop.iadfw.net
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Ответ на Re: Request for qualified column names  (Bruce Momjian <pgman@candle.pha.pa.us>)
Ответы Re: Request for qualified column names  (Bruce Momjian <pgman@candle.pha.pa.us>)
Re: Request for qualified column names  (Rod Taylor <rbt@rbt.ca>)
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--On Monday, January 27, 2003 15:49:06 -0500 Bruce Momjian 
<pgman@candle.pha.pa.us> wrote:

>
> My idea on this after chat with Dave was to add a GUC option that puts
> the schema.table.column name as the default column label, rather than
> just the column name.  (That's so easy, I think even I could do it.)  If
> they over-ride it with AS, or if it is an aggregate or FROM subquery, we
> just return the default label as we do now --- we could return no label
> for those cases, but that seems too drastic.  I am not overly excited
> about doing this at the protocol level unless there is major need for it.
DONT DEFAULT TO THE NEW ONE WITHOUT NOTICE!

You will ***BREAK*** people.

LER

>
> -------------------------------------------------------------------------
> --
>
> Tom Lane wrote:
>> "Reggie Burnett" <rykr@bellsouth.net> writes:
>> > When talking about expressions,views, or any other construct that could
>> > combine values from multiple tables I think it is reasonable to provide
>> > null as the table name.  Any one or any process requesting the table
>> > name has to understand that not all SQL parameters have a base table
>> > name.  However, in the case where a single table is involved, table and
>> > schema names should be available.
>>
>> That seems quite pointless.  You hardly need the backend's help to
>> determine which column belongs to which table in a single-table query.
>> AFAICS this facility is only of interest if it does something useful
>> in not-so-trivial cases.
>>
>>             regards, tom lane
>>
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>
> --
>   Bruce Momjian                        |  http://candle.pha.pa.us
>   pgman@candle.pha.pa.us               |  (610) 359-1001
>   +  If your life is a hard drive,     |  13 Roberts Road
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-- 
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 972-414-9812                 E-Mail: ler@lerctr.org
US Mail: 1905 Steamboat Springs Drive, Garland, TX 75044-6749





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