CREATE USER MAPPING
CREATE USER MAPPING command to define the mapping of a specific user to authorization credentials in the foreign server. The foreign-data wrapper uses the information provided by the foreign server and the user mapping to connect to the external data source.
The owner of a foreign server can create user mappings for the server for any user. Moreover, a user can create user mapping for themself if they have
USAGE privilege on the server.
create_user_mapping ::= CREATE USER MAPPING [ IF NOT EXISTS ] FOR user SERVER server_name [ OPTIONS ( fdw_options ) ]
Create a user mapping for the user user_name for the server server_name. If a mapping between the user and the foreign server already exists, an error will be raised unless the
IF NOT EXISTS clause is used.
OPTIONS clause specifies options for the foreign-data server. They typically define the mapped username and password to be used on the external data source, but the actual permitted option names and values are specific to the server’s foreign data wrapper.
yugabyte=# CREATE USER MAPPING FOR myuser SERVER my_server OPTIONS (user 'john', password 'password');