Re: canceling query

>> No crash, just:
>
>> LOG:  could not send data to client: Unknown error
>> LOG:  could not receive data from client: Unknown error
>> LOG:  unexpected EOF on client connection
>
>This is expected except for the "Unknown error".  You should be
>seeing the equivalent of EPIPE, typically "Broken pipe" on Unixen.
>It sounds like the error number handling may not be quite right
>on Win32.

A quick lock at this shows that the problem is probably that %m has no
clue about winsock error codes. There is a workaround strerror() in
libpq on win32 (see interfaces/libpq/win32.c and libpq-int.h). My bet is
it's the same thing.

I beleive the fix needs to be in backend/utils/elog.c, function
useful_strerror(). Unless someone either tells me that's the wrong place
or beats me to it, I'll try to get a patch done for this soonest.

//Magnus