Hi, We're planning to upgrade our PostgreSQL database from v8.2.3 to v9.0.3. Before upgrading our Production server, we're trying out this complete upgrade process in a separate database server that is just exactly the replica of the production server. I already took a dump of our database using pg_dump command in v8.2.3: "/usr/local/pgsql/bin/pg_dump -D -f dbdump.sql -S mydbuser mydb" Now, after upgrading PostgreSQL to v9.0.3, I'm trying to import the database dump using: "psql -f dbdump.sql -o dbdump.log -d mydb -U mydbuser". I'm getting the following errors while importing: psql:dbdump.sql:38: ERROR: language "plpgsql" already exists psql:dbdump.sql:102646: ERROR: attempt to redefine parameter "plpgsql.variable_conflict" psql:dbdump.sql:102649: ERROR: function public.plpgsql_call_handler() does not exist I also read from 9.0 release notes that PL/pgSQL is now installed by default. http://www.postgresql.org/docs/current/interactive/release-9-0.html My question is, how do I prevent/fix this error during import. Are all these 3 errors one and the same or are they different errors that each has to be fixed separately? NOTE: We've multiple onsite customer servers that has to be upgraded to v9.0.3, hence I need to address this issue in general. Regards, Gnanam -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin