Re: [subxacts] Aborting a function

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Alvaro Herrera <alvherre(at)dcc(dot)uchile(dot)cl>
Cc: Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [subxacts] Aborting a function
Date: 2004-07-10 05:16:22
Message-ID: 3130.1089436582@sss.pgh.pa.us
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Alvaro Herrera <alvherre(at)dcc(dot)uchile(dot)cl> writes:
> (We could talk about exception support in plpgsql or other language
> handlers but I don't think this is going to happen for 7.5.)

Au contraire ... I think it *must* happen, and indeed that
subtransaction support in plpgsql is not different from exceptions.
Per Honza Pazdziora's recent post:

>> The syntax of handling exceptions is (in PL/SQL):
>>
>> BEGIN
>> some code, for example a bunch of SQL commands;
>> EXCEPTION
>> WHEN nameofexception THEN
>> handle the exception, maybe ROLLBACK;
>> END;

This should be exactly how you invoke a subtransaction in plpgsql.
Anything else will be too messy to contemplate...

regards, tom lane

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