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CREATE ACCESS METHOD
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CREATE ACCESS METHOD

CREATE ACCESS METHOD — define a new access method

CREATE ACCESS METHODname    TYPEaccess_method_type    HANDLERhandler_function

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.

name: The name of the access method to be created.
access_method_type: This clause specifies the type of access method to define. OnlyTABLE andINDEX 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 typeinternal, and its return type depends on the type of access method; forTABLE access methods, it must betable_am_handler and forINDEX access methods, it must beindex_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 inChapter 61 and the index access method API is described inChapter 62.

Create an index access methodheptree with handler functionheptree_handler:

CREATE ACCESS METHOD heptree TYPE INDEX HANDLER heptree_handler;

CREATE ACCESS METHOD is aPostgreSQL extension.