ALTER FOREIGN DATA WRAPPEPostgreSQL 15.7 DocumentALTER FOREIGN DATA WRAPPER(7)
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_ROLE | 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 15.7 2024 ALTER FOREIGN DATA WRAPPER(7)
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