CREATE ACCESS METHOD(7)  PostgreSQL 16.2 Documentation CREATE ACCESS METHOD(7)

NAME
       CREATE_ACCESS_METHOD - define a new access method

SYNOPSIS
       CREATE ACCESS METHOD name
           TYPE access_method_type
           HANDLER handler_function

DESCRIPTION
       CREATE ACCESS METHOD creates a new access method.

       The access method name must be unique within the database.

       Only superusers can define new access methods.

PARAMETERS
       name
           The name of the access method to be created.

       access_method_type
           This clause specifies the type of access method to define. Only
           TABLE and INDEX are supported at present.

       handler_function
           handler_function is the name (possibly schema-qualified) of a
           previously registered function that represents the access method.
           The handler function must be declared to take a single argument of
           type internal, and its return type depends on the type of access
           method; for TABLE access methods, it must be table_am_handler and
           for INDEX access methods, it must be index_am_handler. The C-level
           API that the handler function must implement varies depending on
           the type of access method. The table access method API is described
           in Chapter 63 and the index access method API is described in
           Chapter 64.

EXAMPLES
       Create an index access method heptree with handler function
       heptree_handler:

           CREATE ACCESS METHOD heptree TYPE INDEX HANDLER heptree_handler;

COMPATIBILITY
       CREATE ACCESS METHOD is a PostgreSQL extension.

SEE ALSO
       DROP ACCESS METHOD (DROP_ACCESS_METHOD(7)), CREATE OPERATOR CLASS
       (CREATE_OPERATOR_CLASS(7)), CREATE OPERATOR FAMILY
       (CREATE_OPERATOR_FAMILY(7))

PostgreSQL 16.2                      2024              CREATE ACCESS METHOD(7)