Re: rollback in C functions

> The function is to execute updates on each ID assigning the value, but if
> one of these operation fails (does not meet certain criteria)
> inside the function i would like to rollback and leave everything
> untouched, in case other ID;s were already updated previously,
> and come back to the caller and infor

Hi,

I think you want ereport(), here is an example:
http://www.postgresql.org/docs/9.3/static/xfunc-c.html

Bye,
Chris.