Re: Syntax decisions for pl/pgsql RAISE extension

2008/5/12 Tom Lane <tgl@sss.pgh.pa.us>:
> "Brendan Jurd" <direvus@gmail.com> writes:
>> I agree that the % formatting in the RAISE message is weird, but it is
>> useful.
>
> Sure, I'm not proposing removing it.
>
>> What would we do if the user specifies a %-formatted message as well
>> as a MESSAGE option?
>
> Throw an error (just like if they specified the same option type twice).
>
>> I like "RAISE condition_name", can we support it in conjunction with
>> the current syntax?  That is:
>
>>     RAISE level [condition] [string literal, [parameter, ...]] [USING
>> [option = value, ...]]
>
> Well, it's sort of a mess because level has to become optional in order
> to be Oracle-compatible (or PSM-compliant, if Kevin is correct).  We
> could get away with it only if the condition were not allowed to be
> a string literal, which I guess is tolerable but it's a bit annoying.
> It would get less annoying if we allowed user-declared exception names.
> I find the Oracle syntax for those to be spectacularly awful:
>
>        DECLARE
>           deadlock_detected EXCEPTION;
>           PRAGMA EXCEPTION_INIT(deadlock_detected, -60);
>
> but it sounds like SQL/PSM's syntax isn't so bad.  I could live with
> the reported
>
>        DECLARE
>           condition-name CONDITION FOR SQLSTATE VALUE character-literal
>
> However, that's a separate feature and I don't want to get into it as
> part of the current patch.
>
>                        regards, tom lane
>

Tom, it's exactly like my patch that you rejected two years ago.

http://archives.postgresql.org/pgsql-patches/2005-07/msg00176.php

Pavel