ALTER USER MAPPING
Synopsis
ALTER USER MAPPING FOR { user_name | USER | CURRENT_USER | SESSION_USER | PUBLIC }
SERVER server_name
OPTIONS ( [ ADD | SET | DROP ] option ['value'] [, ... ] )
Description
ALTER USER MAPPING changes the definition of a user mapping.
The owner of a foreign server can alter user mappings for that server for any user. Also, a user can alter a user mapping for his own user name if USAGE privilege on the server has been granted to the user.
Parameters
- user_name
-
User name of the mapping. CURRENT_USER and USER match the name of the current user. PUBLIC is used to match all present and future user names in the system.
- server_name
-
Server name of the user mapping.
- OPTIONS ( [ ADD | SET | DROP ] option [' value '] [, ... ] )
-
Change options for the user mapping. The new options override any previously specified options. ADD , SET , and DROP specify the action to be performed. ADD is assumed if no operation is explicitly specified. Option names must be unique; options are also validated by the server's foreign-data wrapper.
Examples
Change the password for user mapping bob , server foo :
ALTER USER MAPPING FOR bob SERVER foo OPTIONS (user 'bob', password 'public');
Compatibility
ALTER USER MAPPING conforms to ISO/IEC 9075-9 (SQL/MED). There is a subtle syntax issue: The standard omits the FOR key word. Since both CREATE USER MAPPING and DROP USER MAPPING use FOR in analogous positions, and IBM DB2 (being the other major SQL/MED implementation) also requires it for ALTER USER MAPPING , PostgreSQL diverges from the standard here in the interest of consistency and interoperability.