Re: Remove mention in docs that foreign keys on partitioned tables are not supported

[Rui DeSousa]

> On Jun 14, 2018, at 9:19 AM, Robert Haas <robertmh...@gmail.com> wrote:
> 
>  anyone who wants a BEFORE trigger has a good reason
> for wanting it.

I have used before triggers to enforce the immutability of a column.

i.e. 

  if (new.member_key != old.member_key) then
    raise exception 'Unable to change member_key, column is immutable';
  end if
  ;