Re: Error code for "terminating connection due to conflict with recovery"

Tatsuo Ishii <ishii@postgresql.org> writes:
>> Review:
>> The only possible point of concern I see here is the naming of the C
>> identifier.  Everything else in class 40 uses ERRCODE_T_R_whatever,
>> with T_R standing for transaction rollback.  It's not obvious to me
>> that that convention has any real value, but perhaps we ought to
>> follow it here for the sake of consistency?

> Yeah. Actually at first I used "T_R" convention. After a few seconds
> thought, I realized that "T_R" is not appropreate by the same reason
> you feel. Possible other argument might be "Terminating connection
> always involves transaction rollback. So using T_R is ok". I'm not
> sure this argument is reasonable enough though.

This is not only a matter of some macro name or other.  According to the
SQL standard, class 40 itself is defined as "transaction rollback".
If the error condition can't reasonably be regarded as a subcase of
that, you're making a bad choice of SQLSTATE code.
        regards, tom lane