Re: logicalrep_message_type throws an error

On Mon, Jul 3, 2023, at 7:30 AM, Ashutosh Bapat wrote:
> logicalrep_message_type() is used to convert logical message type code
> into name while prepared error context or details. Thus when this
> function is called probably an ERROR is already raised. If
> logicalrep_message_type() gets an unknown message type, it will throw
> an error, which will suppress the error for which we are building
> context or details. That's not useful. I think instead
> logicalrep_message_type() should return "unknown" when it encounters
> an unknown message type and let the original error message be thrown
> as is.

Hmm. Good catch. The current behavior is:

ERROR:  invalid logical replication message type "X" 
LOG:  background worker "logical replication worker" (PID 71800) exited with exit code 1

... that hides the details. After providing a default message type:

ERROR:  invalid logical replication message type "X"
CONTEXT:  processing remote data for replication origin "pg_16638" during message type "???" in transaction 796, finished at 0/16266F8

Masahiko, since abc0910e2e0 is your patch maybe you want to take a look at it.


--
Euler Taveira
EDB   https://www.enterprisedb.com/