| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Hiroshi Inoue <Inoue(at)tpf(dot)co(dot)jp> |
| Cc: | Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: RFC: Restructuring pg_aggregate |
| Date: | 2002-04-11 04:50:15 |
| Message-ID: | 200204110450.g3B4oFq02968@candle.pha.pa.us |
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| Lists: | pgsql-hackers |
Hiroshi Inoue wrote:
> > It seems to me that whatever we do
> > will require some kind of client breakage.
>
> Physical/logical attnum approach was mainly to not break
> clients. I implemented it on trial but the implementation
> was hard to maintain unfortunately. It's pretty difficult
> to decide whether the number is physical or logical in
> many cases.
How many cases do we have that use logical numering? Hiroshi, I know
you are the expert on this. I know 'SELECT *' uses it, but are their
other places that need to know about the logical ordering of the
columns?
--
Bruce Momjian | http://candle.pha.pa.us
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