Re: Triggers using PL/pgSQL

Is it really necessary to build a SQL string and use execute? It  
seems you could just issue the INSERT statement.


On Jul 31, 2006, at 12:52 AM, Aaron Bono wrote:

> CREATE OR REPLACE FUNCTION my_table_history_fn () RETURNS SETOF  
> opaque AS
> '
> BEGIN
>     -- if a trigger insert or update operation occurs
>     IF TG_OP = ''INSERT'' OR TG_OP = ''UPDATE'' THEN
>         execute
>             ''INSERT INTO my_table_history ( '' ||
>             ''    my_table_id, '' ||
>             ''    my_value, '' ||
>             ''    create_dt '' ||
>             '') VALUES ( '' ||
>             ''    '''''' || NEW.my_table_id || '''''', '' ||
>             ''    '''''' || NEW.my_value || '''''', '' ||
>             ''    now() '' ||
>             '');''
>         ;
>         RETURN NEW;
>     END IF;
> END;
> '
> LANGUAGE 'plpgsql' VOLATILE CALLED ON NULL INPUT SECURITY INVOKER;



John DeSoi, Ph.D.
http://pgedit.com/
Power Tools for PostgreSQL