Changes the definition of a user mapping for a foreign server.

Synopsis

ALTER USER MAPPING FOR { <username> | USER | CURRENT_USER | PUBLIC }
    SERVER <servername>
    OPTIONS ( [ ADD | SET | DROP ] <option> ['<value>'] [, ... ] )

Description

ALTER USER MAPPING changes the definition of a user mapping for a foreign server.

The owner of a foreign server can alter user mappings for that server for any user. Also, a user granted USAGE privilege on the server can alter a user mapping for their own user name.

Parameters

username

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.

servername

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 perform. If no operation is explicitly specified, the default operation is ADD. Option names must be unique. Greenplum Database validates names and values using 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, Greenplum Database diverges from the standard here in the interest of consistency and interoperability.

See Also

CREATE USER MAPPING, DROP USER MAPPING

Parent topic: SQL Commands