"Pavel Stehule" <pavel.stehule@gmail.com> writes:
> this patch adds possibility to set additional options (SQLSTATE,
> DETAIL, DETAIL_LOG and HINT) for RAISE statement,
I looked this over briefly. A couple of comments:
* Raising errors via hard-coded SQLSTATEs seems pretty unfriendly,
at least for cases where we are reporting built-in errors. Wouldn't
it be better to be able to raise errors using the same SQLSTATE names
that are recognized in EXCEPTION clauses?
* If we are going to let people throw random SQLSTATEs, there had better
be a way to name those same SQLSTATEs in EXCEPTION.
* I don't really like exposing DETAIL_LOG in this. That was a spur of
the moment addition and we might take it out again; I think it's way
premature to set it in stone by exposing it as a plpgsql feature.
* Please avoid using errstart() directly. This is unwarranted intimacy
with elog.h's implementation and I also think it will have unpleasant
behavior if an error occurs while evaluating the RAISE arguments.
(In fact, I think a user could easily force a backend PANIC that way.)
The approved way to deal with ereport options that might not be there
is like this:
ereport(ERROR,
( ...,
have_sqlstate ? errcode(...) : 0,
...
That is, you should evaluate all the options into local variables
and then do one normal ereport call.
* // comments are against our coding conventions.
regards, tom lane
