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ALTER FOREIGN DATA WRAPPER(7)                   PostgreSQL 9.5.0 Documentation

NAME
       ALTER_FOREIGN_DATA_WRAPPER - change the definition of a foreign-data
       wrapper

SYNOPSIS
       ALTER FOREIGN DATA WRAPPER name
           [ HANDLER handler_function | NO HANDLER ]
           [ VALIDATOR validator_function | NO VALIDATOR ]
           [ OPTIONS ( [ ADD | SET | DROP ] option ['value'] [, ... ]) ]
       ALTER FOREIGN DATA WRAPPER name OWNER TO { new_owner | CURRENT_USER | SESSION_USER }
       ALTER FOREIGN DATA WRAPPER name RENAME TO new_name

DESCRIPTION
       ALTER FOREIGN DATA WRAPPER changes the definition of a foreign-data
       wrapper. The first form of the command changes the support functions or
       the generic options of the foreign-data wrapper (at least one clause is
       required). The second form changes the owner of the foreign-data
       wrapper.

       Only superusers can alter foreign-data wrappers. Additionally, only
       superusers can own foreign-data wrappers.

PARAMETERS
       name
           The name of an existing foreign-data wrapper.

       HANDLER handler_function
           Specifies a new handler function for the foreign-data wrapper.

       NO HANDLER
           This is used to specify that the foreign-data wrapper should no
           longer have a handler function.

           Note that foreign tables that use a foreign-data wrapper with no
           handler cannot be accessed.

       VALIDATOR validator_function
           Specifies a new validator function for the foreign-data wrapper.

           Note that it is possible that pre-existing options of the
           foreign-data wrapper, or of dependent servers, user mappings, or
           foreign tables, are invalid according to the new validator.
           PostgreSQL does not check for this. It is up to the user to make
           sure that these options are correct before using the modified
           foreign-data wrapper. However, any options specified in this ALTER
           FOREIGN DATA WRAPPER command will be checked using the new
           validator.

       NO VALIDATOR
           This is used to specify that the foreign-data wrapper should no
           longer have a validator function.

       OPTIONS ( [ ADD | SET | DROP ] option ['value'] [, ... ] )
           Change options for the foreign-data wrapper.  ADD, SET, and DROP
           specify the action to be performed.  ADD is assumed if no operation
           is explicitly specified. Option names must be unique; names and
           values are also validated using the foreign data wrapper's
           validator function, if any.

       new_owner
           The user name of the new owner of the foreign-data wrapper.

       new_name
           The new name for the foreign-data wrapper.

EXAMPLES
       Change a foreign-data wrapper dbi, add option foo, drop bar:

           ALTER FOREIGN DATA WRAPPER dbi OPTIONS (ADD foo '1', DROP 'bar');

       Change the foreign-data wrapper dbi validator to bob.myvalidator:

           ALTER FOREIGN DATA WRAPPER dbi VALIDATOR bob.myvalidator;

COMPATIBILITY
       ALTER FOREIGN DATA WRAPPER conforms to ISO/IEC 9075-9 (SQL/MED), except
       that the HANDLER, VALIDATOR, OWNER TO, and RENAME clauses are
       extensions.

SEE ALSO
       CREATE FOREIGN DATA WRAPPER (CREATE_FOREIGN_DATA_WRAPPER(7)), DROP
       FOREIGN DATA WRAPPER (DROP_FOREIGN_DATA_WRAPPER(7))

PostgreSQL 9.5.0                     2016        ALTER FOREIGN DATA WRAPPER(7)