ALTER FOREIGN DATA WRAPPER

Synopsis

Use the ALTER FOREIGN DATA WRAPPER command to alter the definition of the foreign-data wrapper. This command can be used to alter the handler/validator functions or the options of the foreign-data wrapper. It can also be used to change the owner or rename the foreign-data wrapper.

alter_foreign_data_wrapper ::= ALTER FOREIGN DATA WRAPPER fdw_name  
                               [ HANDLER handler_name | NO HANDLER ]  
                               [ VALIDATOR validator_name
                                 | NO VALIDATOR ]  
                               [ OPTIONS ( alter_fdw_options ) ]  
                               [ OWNER TO new_owner ]  
                               [ RENAME TO new_name ]

alter_foreign_data_wrapper

Semantics

Alter the foreign-data wrapper named fdw_name.

Handler:

The HANDLER clause can be used to specify the handler function. The NO HANDLER clause can be used to specify that the foreign-data wrapper has no handler function.

Validator

The VALIDATOR clause can be used to specify the validator function. The NO VALIDATOR can be used to specify that the foreign-data wrapper has no validator function.

Options

The OPTIONS clause can be used to specify the new options of the foreign-data wrapper. ADD, SET, and DROP specify the action to be performed. ADD is assumed if no operation is explicitly specified.

The new owner of the FDW can be specified using new_owner The new name of the FDW can be specified using new_name

Examples

Change the handler to newhandler.

yugabyte=# ALTER FOREIGN DATA WRAPPER my_wrapper HANDLER;

Alter the foreign-data wrapper to have no validator.

yugabyte=# ALTER FOREIGN DATA WRAPPER my_wrapper NO VALIDATOR;

Alter the foreign-data wrapper's options: add new and set it to '1', change the value of old to '2'.

yugabyte=# ALTER FOREIGN DATA WRAPPER my_wrapper OPTIONS(ADD new '1', SET old '2');