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Date: Fri, 17 Mar 2006 08:11:50 +0000
From: Richard Huxton <dev@archonet.com>
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To: emilu@encs.concordia.ca
Cc: pgsql-sql@postgresql.org
Subject: Re: About how to use "exception when ??? then "
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Emi Lu wrote:
> 
>> <snip> From the page:
>> "The PL/pgSQL condition name for each error code is the same as the 
>> phrase shown in the table, with underscores substituted for spaces. 
>> For example, code 22012, DIVISION BY ZERO, has condition name 
>> DIVISION_BY_ZERO. Condition names can be written in either upper or 
>> lower case.
> 
>> (Note that PL/pgSQL does not recognize warning, as opposed to error, 
>> condition names; those are classes 00, 01, and 02.)"
> 
> That means pl/pgsql will not recognize error codes under classes 00, 01, 
> 02.

Correct - they are informational rather than errors. I'm not sure what 
it would mean to trap "successful completion" for example.

> Is there a way, I can output error code?
> exception
>  when ... then
>  when others then
>   raise notice '%, %', SQLSTATE, SQLERRM;
> 
> But it seems that SQLERRM and SQLSTATE did not work for me. By the way, 
> I am using postgresql 8.0.1.

http://www.postgresql.org/docs/8.1/static/release-8-1.html

See section E.4.3.9 - they were defined in 8.1

-- 
   Richard Huxton
   Archonet Ltd