Re: BUG #16843: pg_upgrade from 12.5 to 13.1 with extension plperlu failed

Bruce Momjian <bruce@momjian.us> writes:
> On Thu, Jan 28, 2021 at 10:34:46AM -0500, Tom Lane wrote:
>> PG Bug reporting form <noreply@postgresql.org> writes:
>>> pg_restore: Error: could not execute query: ERROR:  Language »plperlu« does
>>> not exist
>>> The statement was: CREATE OR REPLACE PROCEDURAL LANGUAGE "plperlu";

>> It looks like you neglected to install the plperlu package
>> (it's probably named something like postgresql-plperl).

> Yeah, I am confused why this was not reported clearly to the user.

It is odd that pg_upgrade's checks didn't catch it earlier.  But
we can't investigate without more info about exactly what Postgres
packages are present on the OP's system.

            regards, tom lane