Dear Fujii-san,
> Can we split the patch into two as follows? If so, we can review
> and commit them one by one.
>
> #1. Add application_name GUC into postgres_fdw
> #2. Allow to specify special escape characters in application_name that
> postgres_fdw uses.
OK, I split and attached like that. 0001 adds new GUC, and
0002 allows to accept escapes.
> For now I've not found real use case that implementing the feature
> in libpq would introduce. So IMO postgres_fdw version is better.
+1, so I'll focus on the this version.
Best Regards,
Hayato Kuroda
FUJITSU LIMITED