| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Zoltan Boszormenyi <zb(at)cybertec(dot)at> |
| Cc: | Bruce Momjian <bruce(at)momjian(dot)us>, PG Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: IDENTITY/GENERATED v36 Re: [PATCHES] Final version of IDENTITY/GENERATED patch |
| Date: | 2007-04-16 18:23:56 |
| Message-ID: | 8913.1176747836@sss.pgh.pa.us |
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| Lists: | pgsql-hackers pgsql-patches |
Zoltan Boszormenyi <zb(at)cybertec(dot)at> writes:
> "GENERATED BY DEFAULT AS ( expr )" is another
> way of saying "DEFAULT expr" but that being similar
> to GENERATED ALWAYS AS ( expr ) would make
> the users think that it would permit smarter expressions
> than simple DEFAULT would allow. My thought was
> to disallow this in the grammar.
I think you probably want a more specific error message than "syntax
error" for that, so the right thing to do is complain in code rather
than try to make the grammar per se not have a production that accepts it.
regards, tom lane
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