ALTER FOREIGN DATA WRAPPER(7)                             SQL Commands                             ALTER FOREIGN DATA WRAPPER(7)



NAME
       ALTER FOREIGN DATA WRAPPER - change the definition of a foreign-data wrapper


SYNOPSIS
       ALTER FOREIGN DATA WRAPPER name
           [ VALIDATOR valfunction | NO VALIDATOR ]
           [ OPTIONS ( [ ADD | SET | DROP ] option ['value'] [, ... ]) ]
       ALTER FOREIGN DATA WRAPPER name OWNER TO new_owner


DESCRIPTION
       ALTER  FOREIGN  DATA  WRAPPER changes the definition of a foreign-data wrapper. The first form of the command changes the
       library 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.

       VALIDATOR valfunction
              Specifies a new foreign-data wrapper validator function.

              Note  that  it is possible that after changing the validator the options to the foreign-data wrapper, servers, and
              user mappings have become invalid. It is up to the user to make sure that these options are correct  before  using
              the foreign-data wrapper.

       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 library.

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). The standard does not specify the  VALIDATOR and OWNER
       TO variants of the command.

SEE ALSO
       CREATE FOREIGN DATA WRAPPER [create_foreign_data_wrapper(7)], DROP FOREIGN DATA WRAPPER [drop_foreign_data_wrapper(7)]



SQL - Language Statements                                  2011-09-22                              ALTER FOREIGN DATA WRAPPER(7)