Excerpts from Will Leinweber's message of mar sep 27 20:57:52 -0300 2011:
> I ruined a 5 hour UPDATE by typoing a table name on a SELECT to verify
> the update worked. I suppose I have no one else to blame, but it was
> really frustrating, to say the least. I assume this has happened to
> others as well.
> 
> I only later found out about SAVEPOINT, which I immediately ran the
> next time I attempted the huge update.
> 
> psql console, while in a transaction, and while in interactive mode,
> should savepoint for me.

See ON_ERROR_ROLLBACK
http://www.postgresql.org/docs/9.0/static/app-psql.html

-- 
Álvaro Herrera <alvhe...@commandprompt.com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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