How does postgres change table owner under a specific schema?

If you can query the table names in your schema, you can generate the queries to ALTER table ownership. Then you postgres change table owner under any specific schema.

For example:
select 'ALTER TABLE ' || t.tablename || ' OWNER TO new_owner;' from pg_tables t where t.tableowner != 'rdsadmin';
will return the query to change ownership of all tables:
ALTER TABLE schema_version OWNER TO ali; ALTER TABLE users OWNER TO ali; ALTER TABLE company OWNER TO ali; ALTER TABLE books OWNER TO ali; ...
then you can just run these