Unable to restore psql database from pg_dump with a different username

Question

I need to dump a postgres database from computer1 with postgres username1 and then restore it on computer2 with postgres username2. I keep running into the error that looks like the backup file wants to use username1:

When I run this on computer2:

psql dbname < backupname.pgsql

I get this error:

ERROR:  role "username1" does not exist

I have tried:

// Dumping from computer1:

pg_dump dbname > backupname.sql
pg_dump dbname > backupname.pgsql
pg_dump -U username1 dbname -N topology -T spacial_ref_sys > backupname.pgsql


// Restoring on computer2:

psql dbname < backupname.pgsql

Is it the dumping or the restoring that needs to be modified to get past this?

Answer 1

The problem is with the dumping. With insight from this post I was able to resolve this using:

// On Computer1

pg_dump dbname -O -x > backupname.sql


// On Computer2

psql dbname < backupname.sql

The option flags used with pg_dump are:

-O   <-- No owner
         Do not output commands to set ownership of objects to match the original database

-x   <-- No privileges
         Prevent dumping of access privileges (grant/revoke commands)

See the PostgreSQL docs for pg_dump for more info on the option flags.