NAME

       ALTER_USER_MAPPING - change the definition of a 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 their 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 (SET 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.

SEE ALSO

       CREATE USER MAPPING (CREATE_USER_MAPPING(7)), DROP USER MAPPING (DROP_USER_MAPPING(7))