CREATE ACCESS METHOD

CREATE ACCESS METHOD

CREATE ACCESS METHOD

7

SQL - Language Statements

CREATE ACCESS METHOD

define a new access method

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 ??? and the index access method API is described in ???.

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#