Re: Do we still need these NOTICEs?

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От
Bruce Momjian
Тема
Re: Do we still need these NOTICEs?
Дата
Msg-id
200207170529.g6H5TQL29386@candle.pha.pa.us
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Дерево обсуждения
Do we still need these NOTICEs? Tom Lane <tgl@sss.pgh.pa.us>
Re: Do we still need these NOTICEs? Bruce Momjian <pgman@candle.pha.pa.us>
Re: Do we still need these NOTICEs? "Christopher Kings-Lynne" <chriskl@familyhealth.com.au>
Tom Lane wrote:
> Joe Conway  writes:
> > One thing I wondered about here -- is it still possible to use a 
> > sequence, which is autogenerated by a SERIAL column, as the default 
> > value for another table?
> 
> Sure, same as before.
> 
> > If so, does this create another dependency to 
> > prevent dropping the sequence, and hence the original (creating) table also?
> 
> As the code stands, no.  The other table's default would look like
> 	nextval('first_table_col_seq')
> and the dependency deducer only sees nextval() and a string constant
> in this.
> 
> Someday I'd like to see us support the Oracle-ish syntax
> 	first_table_col_seq.nextval
> which would expose the sequence reference in a way that allows the
> system to understand it during static examination of a query.

OK, so creator tracks it, and referencers, even in DEFAULT, don't.  Good
to know and probably something we need to point out in the release
notes.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610) 853-3000 +  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026

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