Re: Pg_upgrade error could not load library from 7.14/8.4 to 10.10version

Hi Achilleas,

El 20/9/19 a las 9:26, Achilleas Mantzios escribió:
> Just tested in my 11 and 10 :
> dynacom=# select proname,probin,pronamespace from pg_proc where 
> proname='plpgsql_call_handler';
>        proname        |             probin              | pronamespace
> ----------------------+---------------------------------+--------------
>  plpgsql_call_handler | $libdir/plpgsql |           11
>  plpgsql_call_handler | /usr/local/pgsql/lib/plpgsql.so | 2200
> (2 rows)
>
> with 2200 being the public namespace/schema.
>
> I my case, in every postgresql installation since 2001, always libdir 
> was /usr/local/pgsql/lib/ , so maybe this problem could not be 
> manifested. Did you check to see if you have the plpgsql_call_handler 
> defined in two schemas as well?
>
> -- 
> Achilleas Mantzios
> IT DEV Lead
> IT DEPT
> Dynacom Tankers Mgmt


I've restored template1 in v8.4, and created again the db where I will 
be restoring v7.14 backup

newdb=# select proname,probin,pronamespace from pg_proc where 
proname='plpgsql_call_handler';
  proname | probin | pronamespace
---------+--------+--------------
(0 filas)


And in v10.10 (which is still an empty installation)

template1=# select proname,probin,pronamespace from pg_proc where 
proname='plpgsql_call_handler';

        proname        |     probin      | pronamespace
----------------------+-----------------+--------------
  plpgsql_call_handler | $libdir/plpgsql |           11
(1 row)


After restoring backup in v8.4:

newdb=# select proname,probin,pronamespace from pg_proc where 
proname='plpgsql_call_handler';
        proname        |                 probin                 | 
pronamespace
----------------------+----------------------------------------+--------------
  plpgsql_call_handler | $libdir/plpgsql |           11
  plpgsql_call_handler | /usr/lib/postgresql/8.4/lib/plpgsql.so 
|         2200
(2 filas)

As you said, 2200 is public namespace/schema and 11 is pg_catalog.


At the beginning of the backup file I can find these sentences:

CREATE FUNCTION plpgsql_call_handler() RETURNS language_handler
     LANGUAGE c
     AS '/usr/lib/postgresql/8.4/lib/plpgsql.so', 
'plpgsql_call_handler'; <-- I've changed this line to use the right path 
to plpgsql.so library

CREATE PROCEDURAL LANGUAGE plpgsql HANDLER plpgsql_call_handler;

I guess these are the ones causing all of this. **What should be the 
best way to handle this situation?** Remove these lines and create the 
language explicitly when creating database? Or replace them with a 
create language sentence? Maybe something else? My final goal is migrate 
from 7.14 server to 8.4 server and after that (if I have an OK from the 
boss) upgrade 8.4 to the latest version that I can use. Server uses 
CentOS, and probably I won't be able to upgrade to v10 but I hope at 
least 9.5/9.6 will be available.