Re: Question about accessing current row data inside trigger

On Tue, Mar 08, 2005 at 11:37:14AM -0800, peter Willis wrote:

> I have a trigger function written in C.
> The trigger function is called via:
>
> CREATE TRIGGER after_update AFTER UPDATE ON some_table
> FOR EACH ROW EXECUTE PROCEDURE my_trigger_function();
>
> Since the trigger is called after each row update the actual row data
> should be available in some way to the trigger.
> What functionality (SPI ?) do I use to use the column values from
> the current row in the actual trigger?

See "Writing Trigger Functions in C" and "C-Language Functions" in
the documentation. Here are links to documentation for the latest
version of PostgreSQL:

http://www.postgresql.org/docs/8.0/interactive/trigger-interface.html
http://www.postgresql.org/docs/8.0/interactive/xfunc-c.html

--
Michael Fuhr
http://www.fuhr.org/~mfuhr/