Re: Better error messages for %TYPE and %ROWTYPE in plpgsql

> Per recent discussion[1], plpgsql returns fairly unhelpful "syntax
> error" messages when a %TYPE or %ROWTYPE construct references a
> nonexistent object.  Here's a quick little finger exercise to try
> to improve that.

Looks this modify the error message, I want to know how ould we treat
error-message-compatible issue during minor / major upgrade. I'm not
sure if my question is too inconceivable, I ask this because one of my
patch [1] has blocked on this kind of issue [only] for 2 months and
actaully the error-message-compatible requirement was metioned by me at
the first and resolve it by adding a odd parameter. Then the odd
parameter blocked the whole process. 

[1] https://www.postgresql.org/message-id/87r0hmvuvr.fsf@163.com

-- 
Best Regards
Andy Fan