Re: Terminating a backend

Bruce Momjian <bruce@momjian.us> writes:
> Bruce Momjian wrote:
>> When we get the termination signal, why can't we just set a global
>> boolean, do a query cancel, and in the setjmp() code block check the
>> global and exit --- at that stage we know we have released all locks and
>> can exit cleanly.

> Should I add this as a TODO?  Seems so.  Tom commented in the patches
> queue that it will not work but I don't understand why.

The problem with treating it like elog(ERROR) is that you're at the
mercy of user-defined code as to whether you'll actually exit or not.
UDFs can trap elog(ERROR).
        regards, tom lane