Re: parallel workers and client encoding

On 6/6/16 9:45 PM, Peter Eisentraut wrote:
> Attached is a patch to illustrates how this could be fixed. There might
> be similar issues elsewhere. The notification propagation in particular
> could be affected.

Tracing the code, NotificationResponse messages are converted to the
client encoding during transmission from the worker to the leader and
then sent on binarily to the client, so this should appear to work at
the moment. But it will break if we make a change like I suggested,
namely changing the client encoding in the worker process to be the
server encoding, because then nothing will transcode it before it
reaches the client anymore. So this will need a well-considered
solution in concert with the error/notice issue.

Then again, it's not clear to me under what circumstances a parallel
worker could or should be sending a NotificationResponse.

--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services